Microbiologist here, when the guy was talking about the fish "not being able to speak to each other" he was probably referring to quorum sensing. Biofilms on fish scales give signals between other bacteria which allows a fish to glow for communication purposes. I know deep sea fish do it. I don't know if goldfish do it, but I wouldn't be surprised if they can give off a faint signal or one outside of the e-mag spectrum of human vision.
so a bit like in freshwater fish where they brighten their colours to show dominance and vigour and lower them when stressed or in a lower part of the tank hierarchy particularly with cichlids like my electric blue acara whose head seems to change hues when flared up or when feeling neutral or stressed
Yeah, he's not that fluent with English or Spanish as to really give such an specific explanation even though he talks both languages, he's Heiko Bleher, quite an interesting man
That man is actually an Ichthyologist himself. He's Heiko Bleher known throughout the aquarium hobby and even had a fish named after him the Hemigrammus bleheri, a type of rummy nose tetra.
the weirdest thing is that the dude said the sharkcaino 'mutated' the sharks. Like volcanoes area not radioactive, and even if they were, radiation just kills things, it doesn't actually turn them into monsters.
Yeah, radiation can give some gnarly mutations and deformities but even then and even if not lethal it’s not really the Hulk or Resident Evil sorta thing. It’s more like malformed limbs, extra fingers, abscesses, harlequin ichytosis, etc. Not becoming capable of just casually hanging out in volcanoes. Idk why people think radiation works this way just because comics and movies take artistic liberties with it. It baffles me how so many people are so incapable of differentiating these things from reality. Not blaming the comics or movies, though, I’m blaming the people for being dumb.
Volcanoes can actually be surprisingly radioactive- but it is entirely dependent on what kind of material is present in the volcano's system, which tends to just be "above trace" levels of long-lived radioisotopes. And that's not even getting started on how much of a difference water makes on the matter...
The Pacu biting off dude's junk is based off a single case Animal Planet REALLY wanted you to know about with the corresponding episode of River Monsters, like 75% of the episode is "what if Jeremy Wade got castrated by a fish in a river" with the only "conclusion" to the attack was the Pacu are invasive in this area and they've eaten 80%+ of the vegetation in the water, thusly a few specimens were recorded taking meat as bait, and now the whole species is painted like castration fish hungry for your boys.
The Pacu thing is actually true, it happened in Papua New Guinea where they were introduced and actually began eating anything they could stuff in their mouths as they had no real food source. And to my knowledge it was one incident.
Now that actually makes sense. Newly introduced fish that literally don't know what they're supposed to eat. Poor fish, tbh. (And ofc poor whoever got bitten but, y'know.)
@@olive6942 there was some other things that happened over in nebraska as well though. I watched the story on the news. I couldnt tell you what year tho
Came here to say this. Idiots introducing non native species turned a vegetarian fish into an opportunistic carnivore. There was one confirmed case of a man getting bitten on his genitals, I saw Jeremy Wade interviewed the guy and there was anecdotal reports of other being bitten although not on their genitals.
The person making a speach about the Glofish is actually Heiko Bleher, an ichthyologist who discovered hundreds if not thousands of fresh water fish and has written plenty of books about them. The context of his statement about them not getting to speak to each other pertains to their inability to be 'natural' and something with them breeding unnaturally thus they're like alien.
I don’t know why people hate glofish so much. Yeah they look childish and I wouldn’t get em, but they’re super hardy and healthy due to a diverse genetic pool, goldfish and guppies are way worse.
@@himlolo you said it yourself, they look childish. Any veteran fish keeper would not want them, maybe even beginners wouldn't want them. Their only purpose is for the hobby and they're not the best when it comes to that. I personally don't mind them and would never get them.
you seem to know your shit so can you tell me what that fish was that he said was the oldest freshwater fish? been trying to find anything on it but its hard without a name for it. searching "oldest freshwater fish" just gets me results involving the lifespan of some fish. I know that at least his claim that its older than the dinosaurs is incorrect if that number of 200 million years is accurate as dinosaurs first diverged from other archosaurs in the mid Triassic, they're just most associated with the Jurassic as that's when they became top dog.
@@bipbopboop730 that's a clip from a video from coralfish12g. His videos about the Colombian fish trade with this man is legit entertaining and informative. You would see the whole context in one of those videos (forgot which one exactly)
The guy who hated the glofish is Heiko Bleher a German researcher, author, photographer and filmmaker best known in the scientific community for his contribution to the exploration of fresh and brackish water habitats worldwide and the discovery of many species of fish and aquatic plants, several of which carry his name, discovery location or are named in honor of Bleher's family.(stolen from the wiki)
It seems AVNJ has some misconceptions, a little critical thinking would lead to the German guy was saying they visually communicate, but AVNJ is just "Fish don't speak." then he has doubt a fish could be prehistoric... I'm starting to question if AVNJ is really a marine biologist or if he's just an enthusiast who thinks he knows it all. His videos are entertaining though.
@@vexaris1890 That's pretty much the same thing as a marine biologist, but that also isn't the point. He doesn't seem to be a biologist of any kind, maybe a student at the most and an enthusiast at the least.
Sharkano, because sharks can somehow evolved completely separate from a regular ocean environment, exactly the same looking as regular sharks but just heat resistant.
There IS actually a volcano in the ocean with Sharks living “inside” of it. Shark Bytes recently did a vid on the same story to clear some misconceptions and take out the sensationalized bits
I wonder what the basis for comparison is. The types targeted by fishermen are lame but the native fish species are rad. Lake sturgeon, paddlefish, gar, catfish, trout, salmon... Also eelpout/burbot since they're described as "a cross between an eel and a catfish" and weird enough to get a nod. There's also a fair chance we have/had a greenland shark in Lake Superior. When it comes to freshwater fish in the states MN is pretty neat.
That lost forest is in The Son Doong Cave, which wasn't discovered until 1990 were a local man accidently discovered it while hunting. It took him 19 years to rediscover it again in 2009
It was found in 90 (91 by some accounts but the wall at the end says 90) and hiked fully gone through in 09 by the bcra, I believe. The world's biggest cave and was a mystery until less the 20 years ago. Has two forests with trees 100ft+ tall from where it has collapsed in, it's own weather systems, can fit skyscrapers inside of it... its insane and a hike I am planning to do. It takes 2 days to go from entrance to entrance and only like 1000 people a year can hike it. It's pretty amazing
Thought about the Pacu thing and realised: Whenever you hear a weird story of the sort remember that, although they had clothings, south american natives (mostly brazilian ones) are always freeballing it in rivers
@@testaccpunt799 Heiko is around 78, maybe during the time he was studying those things like the knife fish there is no other known specie of fish that can do swim backwards maybe just maybe. And I don't see 3 mistakes only the knife fish one it's just the way he construct his sentences that people tend to misinterpret what he is saying. He is not a strong english speaker so I guess that's one the reasons why his choice of words are not that great.
I'm brazilian and can confirm that they do indeed bite into balls, and for that matter, Candirus actually do enter the urethra too. In our jungles and forests you can still find indigenous tribes, and those people are naked, freeballing all the time, including when bathing in waters with Pacus and Candirus. Those are the main victims of those fish.
I really have my doubts about the Candirus claim, if it were that common I have a feeling it would have been documented more. And the only time it has been documented, the story did not check out, and was likely a hoax.
@@notapplicable6985 If true, my guess is that nowadays people wear shorts or even full clothes when going into water. European adventurers wearing pants didn't have to deal with that but heard stories from the native folk.
@@notapplicable6985 as a fellow brazilian i can confirm that it's not really common but it does happen, and it's not formally documented because it normally just goes around through oral traditions and such
@@notapplicable6985 i guess being brazilian is some sort of credential for the moment, so hey, i'm brazilian. And there's a video on youtube, from/by Jeremy Wade in which he actually talks about one of the documented cases of a candiru (a blood sucking fish) attaching itself to someone's urethra, and even shows the conserved culprit to the victim
@@UrMom-kp1ji My dude. You just said its true cause people told you it is. If wed go off "Oral tradition" the world would have been ended by some mythical being 20 times over and dragons and wizards would be real, so thats not really what we whanna base our knowledge on.
We bought some glofish a few years ago, and a few of them were those glo-skirt tetras. Little guys schooled with the other skirts, and ended up outliving them. We still have two of them that refuse to die.
I get the Glo-fish hate but it's not really that bad of a genetic change. Using transgenesis, you can insert a gene that produces a naturally occurring fluorescent protein in the fishes tissues and breed them for several generations. It doesn't significantly change the genome of the fish, except that they glow. It's not that far off of nature, many fish already have bioluminescence anyway.
That last clip was Heiko Bleher, the famous fish aquarist and researcher. Unfortunately he was wrong about the knife fish being the only fish that can swim backwards. Even the greats make mistakes sometimes.
I love his sense of humor so much. So dry, lol. A lot of these reaction type videos tend to be so forced and overly dramatic, but this guy's super chill.
I’m from Texas and plecos in our rivers are a *huge* problem. The temperatures here are perfect for them (and a lot of other tropical aquarium fish) to thrive, but there’s no predators that can eat them. There’s many endangered and threatened species in central and south Texas and the plecos are starving out those native species. Some local areas have had contests in local rivers on who can catch the most plecos to try and limit their numbers, but there’s so much vast rural area and so many lakes here that it may be impossible to get them under control. Last I read, they think there’s so many now that in some areas they’re breeding.
I was looking around the Berlin Aquarium a few days ago, and I'm happy to say that to me, based on what I've learned on this channel, all the aquariums looked nice, big enough, not overcrowded, stuff to hide in etc, it was really quite cool
The guy you think doesn't know what he's talking about is a really famous German biologist, he discovered hundreds of new species all over the world, his name is Heiko bleher
For those who are wondering the cave is called Hang son Doong located in viet nam,(note Viet nam is not in china) it was discovered in the early 90s by a local man named Ko Khanh, but wasn't thoroughly explored until 2009. Apparently he forgot the location untill he re discovered it, and that's why it took so long for a proper expedition.
Guppies are awesome they're super underrated because they're so easy to get their hands on, people don't recognize their beauty because they're so easy to see, but just because it's not impossible to own them and they have no hard care requirements doesn't mean they're not special.
that guy you said was a little confused is Heiko Bleher and he discovered thousands (!!) of NEW freshwaterfish in the amazon and all over the world. AND he is 78 years old and still going on missions to discover new species.
@@nic6715 Avnj said he agreed with what Bleher said but disagreed that the fish cannot communicate to eacother anymore. He didn't outright disagree his entire statement or called him ignorant fully. It is understandable to question someone's knowledge when they make a single mistake.
heiko Bleher (born 18 October 1944) is a German researcher, author, photographer and filmmaker best known in the scientific community for his contribution to the exploration of fresh and brackish water habitats worldwide and the discovery of many species of fish and aquatic plants, several of which carry his name, discovery location or are named in honor of Bleher's family. Heiko Bleher was born in Frankfurt on Main, Germany. He is the fourth and last child of Ludwig Bleher and Amanda Flora Hilda Bleher, born Kiel. Bleher inherited his passion for freshwater fishes and aquatic plants from his mother Amanda Flora Hilda Bleher was the daughter of Aolf Kiel - "Father of Water Plants" and pioneer of the modern aquarium starting in 1887, who established the world's largest plant and ornamental fish farm in Frankfurt am Main, Germany, in 1900. At the age of 4, Bleher’s mother took him to Equatorial Guinea, in West Africa on a research expedition and 2 years later he accompanied his mother on a journey throughout Europe collecting plants and fishes. By age 7, he and his three siblings joined their mother on her adventurous exploration trip deep into the South American jungle, where they lived with natives. During this 2-year expedition from 1953 to 1955 his mother discovered many new aquatic plant species, fishes and other animals. At the end of 1958, Bleher's family settled permanently in Brazil and established a water-plant nursery and fish-breeding hatchery called "Osiris" in the jungle outside of Rio de Janeiro. In 1962, Bleher moved to the US and later attended the University of South Florida, studying courses in ichthyology, biology, limnology, oceanography, parasitology, combined with the work at Elsberry's Fish Farm and at Gulf Fish Farm. Two years later, after his return to Rio de Janeiro, Bleher established his own export company "Aquarium Rio" and continued his research and collecting throughout Brazil. At the end of 1964 Bleher introduced the first new species to be named after him, Hemigrammus bleheri (the brilliant rummy-head tetra) to the aquarium hobby. Bleher contributed to the rainbowfish species community by introducing Melanotaenia boesemani this being one of the most popular rainbowfish in the hobby and many of the other almost 100 species of Rainbowfish. In 1970 Bleher was the first to collect live Pterophyllum altum from Venezuela The tetra Hemigrammus bleheri, Leporinus bleheri, Bleheratherina pierucciae, The Cichlid Steatocranus bleheri, The Snakehead Channa bleheri, The African Tetra Phenacogrammus bleheri, Moenkhausia heikoi, The Rainbowfish Chilatherina bleheri, The Bromeliad Vriesea bleheri, Hyphessobrycon amandae is named in honor of Amanda Bleher (1910-1991), the mother of Heiko Bleher, who collected the type specimen and because of her interest in and her knowledge of the freshwater fauna and flora of Brazil. In 2012, Bleher was accused of plagiarising image(s) of fishes, submitting them as his own for an article for Practical Fishkeeping Magazine entitled "PFK's Definitive Guide to Channa". In 2019, Bleher was again implicated in another plagiarism scandal whereby a number of images of freshwater fishes were used in his book "Indian Ornamental Fishes Volume 1". The images were in fact the property of a well known blog writer based in India
5:50 in my state we had a few lakes where they were being taken over by goldfish, and it was greatly impacting the trout and bass populations and destroying the ecosystem all because people dumped their goldfish.
river monster did an entire episode based on pacu introduced into african lakes, biting people including men who usually swim naked in the waters, it was determined that fish had eaten most of the vegetation and was forced to switch diet to meat.
2:52 arapaima got these rock hard heads, And they jump the water and thrash their head 24/7. Bad description but Its a species trait. They've killed people like that, usually in the workers in arapaima farms. The fact that guy just jumped in there with the fish thrashing right near his head is wild. He took a risk
That guy talking about the glofish and other aquarium fish is actually a huge deal in the aquarium fish trade, he has explored deep into remote areas of the world and brought a lot of common aquarium fish into the trade. Even if he doesn’t seem to know quite what he’s talking about from an ichthyology standpoint, his core message is saving as many bodies of water as possible, especially the small, seemingly insignificant streams and creeks around the world because many of them have small populations of fish not found anywhere else. He especially hates how cattle farming and chemical spraying have decimated these small streams and potentially have caused a lot of rare fish species to go extinct without ever being documented
The man talking about those glofish is actually Heiko Bleher, you should look him up if you don't know him, he's the one who discovered a lot of fresh and brakish water aquarium fish we know today
i think the old man was right on the " they cant communicate anymore" My Idea is that animals communicate with colors things like: iam poisonous, iam an venomous or dangerous. When all the animals are neon colored they loose this effect and theor nature.
I'd say he's only partly correct. Colors can certainly be important for communication but they aren't the only way most animals communicate. Behavioral communication is equally or more important in most animals.
@@Evan_Schaefering Heiko is very deep into cichlids and yes for them its very important. I have a breeding pair of wild catched Oscars. I can see there mood depending on there coloration that can change dramatic
@@Zozo806 Of course. I don't deny the importance of color in their communication. I just think his statement of "they can't communicate" was probably a bit too broad, although that could just be because he doesn't speak English natively.
Heiko Bleher is the researcher talking about the fish not being able to speak to each other anymore. He has discovered hundreds maybe even thousands of freshwater fish. He was also correct when speaking about the Bichir being around for millions of years. Super cool! 🌟
Haiko Blair has discovered many many fresh water fish including the rummy nose tetras which are so highly coveted in the aquarium hobby I’m not saying he knows everything but I do trust a good portion of what he has to say when it comes to fish species 💚
10:02 ok if these are manmade why cant we genetically make mice yellow to look like a pikachu, because pikachu is the mouse pokemon, or any other animal to look like a pokemon. nah that probably wouldnt be good at all but would still be kinda cool
For changes like that they need to be useful for science. Glofish weren't originally made for their looks, the glowing genes are used as a "tracker" attached to a target gene. If the fish glows, the genes were successfully integrated into the genome.
5:38 these fish are also a problem in the Philippines where I'm from well kind of some people keep them as pets while I saw in one of the science textbook I had in high school some even eat them in the Philippines they're called janitor fish here
I LOVE Leopard Danios. That's because they have the same shoaling behavior as normal danios, but their fins are flowy so they look like they are tiny ballerinas moving around in a murmur pattern in your tank. I know starlings are an invasive species, but I can't help but appreciate their huge murmurs as they dance around the sky like a dark cloud on acid. Leopard Danios are like that, but only for your aquarium. I can stare at them all day.
Did you throw it in the water? Because you gotta be careful with that as many mistake tortoises for turtles of which then drown in the water occasionally.
The fish feeding reminds me of my aunt's trout pond. My oldest fed them... and then after that there was one that followed him everywhere he walked. LOL.
Yea they probably got fat. Dog food isn't exactly super healthy and is even fattening for dogs, though it depends on the kind with fresh food being way better and dry food tending to be similar to how fast food is for people.
My favorite out of those aquarium fish is the shrimps, they have so many fun colors, but my favorite out of the not-aquarium fish is definitely the lake sturgeon. I just think they’re neat. Love the lil shovel snoots and whiskers.
There are sharks in some underwater volcanoes, but they’re not swimming in magma or anything. Plus water isn’t very easy to change the temperature of, so unless you’re one inch away from the lava it won’t feel too hot underwater. It’s why life is plentiful around hydrothermal vents in spite of the water that exits being in excess of 700° Fahrenheit
My dad had four turtles as a kid. He took pretty good care of them. Up until the end, when he took them into his backyard and of course you take your eyes off them for one minute and they’ve disappeared. I think about how the invasive turtles I see today are descents of my dad’s turtles.
When I first got an aquarium I got a glofish danio because I wanted all my danios to be unique. My other danios schooled up and interacted with each other, but the glofish swam off on his own. About two weeks after I got him, I decided to give my fish some cucumber. I got organic cucumber to reduce pesticide risk and was very thorough about washing it and boiling it, and yet my glofish took one little bite and shot straight up to the surface and began breathing heavily, dying the next day. Meanwhile my other danios and my snails never had a problem with cucumber then or since. Danios are famous for being so hardy that they're used in science experiments. There's just something very wrong with glofish.
While bad tiktokers already frustrate me because of their clear hunger for more views, when they just make shit up or spread misinformation, that's a new level of pissing me off
The one where Mr. Blair is talking about fish talking / communicating is from a documentary. It was more of an emotional comment he made. He's a very respected fish biologist who has discovered many species and has named them.
13:18 not me starting to get nervous because "dude, stop talking and hit play. The fish needs to be in the water! Let the fish get put in the water, hes gonna die! Let him get put back and THEN talk! HES GONNA DIE!" and mean it literally... I think it's time for bed... I've been awake too long...
I was doing a project for a class the whole forest thing was actually just a sinkhole that opened up, underneath the sinkhole there was a cave that housed an ancient forest with undocumented bacterial species I believe.
“The fish can’t communicate anymore” He might’ve been referring to how many types of fish show changes in coloration based on age and health plus many will display new color to show they are ready to breed such as Convict Cichlids which i remember my females getting bright orange stomachs to signal to the males that they had eggs and were read to breed again. When you alter the color in this way, This kind of signaling can’t happen anymore.
ROAST AWAY!!!🙂🙂I seriously WAIT for these vids- but I DID learn a couple of things, too- I wasn’t expecting that, being TikTok & all, but it IS much appreciated!! (The info about classifying a new species, & the fishing PitBull Dogs- all new to me!!)🙂🙂
During the start of the Glow fish chapter I think the guy meant that they were so genetically different that they cant interact with their parent species like they would if they weren't modified When he says "they aren't able to speak to each other" he most likely mean that in a metaphorical way, everyone knows fish don't speak
Not sure about the kissing fish, but when I introduced a new crayfish to my tank some time back the male ran over and immediately burrito'd her and got down to the mating business
There actually is a sharkcano and it did actually erupt not too long ago. The volcano is called Kavachi and its an underwater volcano and in a 2015 expedition, they found two different species living in the hot, acidic waters near the volcano. It erupted on May 25, 2022. It’s one of the most active underwater volcanoes in the part of the Pacific where its located and has been erupting nearly continuously since at least 1939. The two shark species observed living there was the scalloped hammerhead shark and silky sharks. Also as a result of how hot and acidic the water is around it, the water is actually tinted orange. The sharks aren't mutated bc of the volcano but they have mutated/evolved to be able to survive in it
There is exactly one reasonably plausible story of a Pacu attacking a man's little man but that's one person out of millions who go in the water with these fish every day.
I’ve caught a pacu with meat in a pond at my apartments I was so confused because I live up north near the Great Lakes and they’re not a native species so someone obviously threw him in the pond but later that year when winter came the poor guy died but they put up a great fight and are really cool to look at
Bro I realized that I was over feeding my fish when they looked super pregnant but were all males. I started feeding them once a day and they finally look normal.
Yep, which I have respect for that, but he apparently doesn't know everything. We know that the knife fish isn't the only fish that can swim backwards.
![[SFM] Risky Recital](http://i.ytimg.com/vi/RzNkY1_Nk3o/mqdefault.jpg)
Idk why but watching a fish biologist roast bad tiktokers is really satisfying
Agreed
Burn burn tik tokers buuuuuurrrrnnnn 🔥 🔥🔥🔥
Maybe because watching idiots get roasted by people who know what they're doing in general is satisfying
Watching any professional in their field roast bad tik toks is hilarious
nice pfp
Someone in the chat said “free bottom surgery” on the pacu vid and I gotta say that that was the funniest sentence I’ve read all week
cursed
could also be free top surgery, just gotta dip yourself into the water a bit deeper
saw that too and immediately went to the comments
@@roboterrr *aggressively takes notes*
Lego Yoda death sfx
Microbiologist here, when the guy was talking about the fish "not being able to speak to each other" he was probably referring to quorum sensing. Biofilms on fish scales give signals between other bacteria which allows a fish to glow for communication purposes. I know deep sea fish do it. I don't know if goldfish do it, but I wouldn't be surprised if they can give off a faint signal or one outside of the e-mag spectrum of human vision.
so a bit like in freshwater fish where they brighten their colours to show dominance and vigour and lower them when stressed or in a lower part of the tank hierarchy particularly with cichlids like my electric blue acara whose head seems to change hues when flared up or when feeling neutral or stressed
Yeah, he's not that fluent with English or Spanish as to really give such an specific explanation even though he talks both languages, he's Heiko Bleher, quite an interesting man
That man is actually an Ichthyologist himself. He's Heiko Bleher known throughout the aquarium hobby and even had a fish named after him the Hemigrammus bleheri, a type of rummy nose tetra.
@@johnkarlogallardo9158 Heck, he even has a Channa named after him.
Not only that but their natural pattern and color is important too for visual recognition.
the weirdest thing is that the dude said the sharkcaino 'mutated' the sharks. Like volcanoes area not radioactive, and even if they were, radiation just kills things, it doesn't actually turn them into monsters.
Yeah, radiation can give some gnarly mutations and deformities but even then and even if not lethal it’s not really the Hulk or Resident Evil sorta thing. It’s more like malformed limbs, extra fingers, abscesses, harlequin ichytosis, etc. Not becoming capable of just casually hanging out in volcanoes. Idk why people think radiation works this way just because comics and movies take artistic liberties with it. It baffles me how so many people are so incapable of differentiating these things from reality. Not blaming the comics or movies, though, I’m blaming the people for being dumb.
Volcanoes can actually be surprisingly radioactive- but it is entirely dependent on what kind of material is present in the volcano's system, which tends to just be "above trace" levels of long-lived radioisotopes.
And that's not even getting started on how much of a difference water makes on the matter...
To be fair he never said anything about radiation in the volcanoes.
@somegirl weren't there reports that the animals around Chernobyl were larger than normal too?
@@makodolphus7810 I mean, grand central station in New York is more radioactive than a nuclear power plant would consider safe.
The Pacu biting off dude's junk is based off a single case Animal Planet REALLY wanted you to know about with the corresponding episode of River Monsters, like 75% of the episode is "what if Jeremy Wade got castrated by a fish in a river" with the only "conclusion" to the attack was the Pacu are invasive in this area and they've eaten 80%+ of the vegetation in the water, thusly a few specimens were recorded taking meat as bait, and now the whole species is painted like castration fish hungry for your boys.
The Pacu thing is actually true, it happened in Papua New Guinea where they were introduced and actually began eating anything they could stuff in their mouths as they had no real food source. And to my knowledge it was one incident.
Now that actually makes sense. Newly introduced fish that literally don't know what they're supposed to eat. Poor fish, tbh. (And ofc poor whoever got bitten but, y'know.)
Happened iver in Nebraska too I think. I remember hearing about some skinny dippers losing their balls and being rushed to the ER
They got bitten, but they never died. This was investigated by Jeremy Wade, and he actually met the man that was said to have bled out.
@@olive6942 there was some other things that happened over in nebraska as well though. I watched the story on the news. I couldnt tell you what year tho
Came here to say this.
Idiots introducing non native species turned a vegetarian fish into an opportunistic carnivore.
There was one confirmed case of a man getting bitten on his genitals, I saw Jeremy Wade interviewed the guy and there was anecdotal reports of other being bitten although not on their genitals.
The person making a speach about the Glofish is actually Heiko Bleher, an ichthyologist who discovered hundreds if not thousands of fresh water fish and has written plenty of books about them. The context of his statement about them not getting to speak to each other pertains to their inability to be 'natural' and something with them breeding unnaturally thus they're like alien.
Was looking for this... Also the snippets with him was from Coralfish12g
I don’t know why people hate glofish so much. Yeah they look childish and I wouldn’t get em, but they’re super hardy and healthy due to a diverse genetic pool, goldfish and guppies are way worse.
@@himlolo you said it yourself, they look childish. Any veteran fish keeper would not want them, maybe even beginners wouldn't want them. Their only purpose is for the hobby and they're not the best when it comes to that. I personally don't mind them and would never get them.
you seem to know your shit so can you tell me what that fish was that he said was the oldest freshwater fish? been trying to find anything on it but its hard without a name for it. searching "oldest freshwater fish" just gets me results involving the lifespan of some fish. I know that at least his claim that its older than the dinosaurs is incorrect if that number of 200 million years is accurate as dinosaurs first diverged from other archosaurs in the mid Triassic, they're just most associated with the Jurassic as that's when they became top dog.
@@bipbopboop730 that's a clip from a video from coralfish12g. His videos about the Colombian fish trade with this man is legit entertaining and informative. You would see the whole context in one of those videos (forgot which one exactly)
The guy who hated the glofish is Heiko Bleher a German researcher, author, photographer and filmmaker best known in the scientific community for his contribution to the exploration of fresh and brackish water habitats worldwide and the discovery of many species of fish and aquatic plants, several of which carry his name, discovery location or are named in honor of Bleher's family.(stolen from the wiki)
example. the rummynose tetra hemigrammus bleheri
It seems AVNJ has some misconceptions, a little critical thinking would lead to the German guy was saying they visually communicate, but AVNJ is just "Fish don't speak." then he has doubt a fish could be prehistoric... I'm starting to question if AVNJ is really a marine biologist or if he's just an enthusiast who thinks he knows it all. His videos are entertaining though.
@@Master_Yoda1990 He's an Ichthyologist, not a marine biologist. He studies fresh water fish and their parasites and illnesses.
@@vexaris1890 That's pretty much the same thing as a marine biologist, but that also isn't the point. He doesn't seem to be a biologist of any kind, maybe a student at the most and an enthusiast at the least.
Yup Heiko is an Ichthyologist himself.
Sharkano, because sharks can somehow evolved completely separate from a regular ocean environment, exactly the same looking as regular sharks but just heat resistant.
There IS actually a volcano in the ocean with Sharks living “inside” of it. Shark Bytes recently did a vid on the same story to clear some misconceptions and take out the sensationalized bits
Correct me if I'm wrong, but magma is liek really dense and not like water where you sink in it, you would basically just stand on it
@@SalmonRow ah if you didn't die before hand yeah. Magma is melted rock if I remember
there actually are sharks living in some volcanos, shark bytes did a video about it, it was really interesting
@@cryptidcollective1163 and most people who report on it are exaggerating it
As a Minnesotan I am both offended and in agreement with you about our fish lol
im with ya, i also live in MN
Same, Lake Superior make not have the coolest fish but we do have well preserved ✨️dead bodies✨️
😡
I wonder what the basis for comparison is. The types targeted by fishermen are lame but the native fish species are rad. Lake sturgeon, paddlefish, gar, catfish, trout, salmon... Also eelpout/burbot since they're described as "a cross between an eel and a catfish" and weird enough to get a nod. There's also a fair chance we have/had a greenland shark in Lake Superior. When it comes to freshwater fish in the states MN is pretty neat.
Our fish may be borning, but damn do they taste good.
That lost forest is in The Son Doong Cave, which wasn't discovered until 1990 were a local man accidently discovered it while hunting. It took him 19 years to rediscover it again in 2009
It was found in 90 (91 by some accounts but the wall at the end says 90) and hiked fully gone through in 09 by the bcra, I believe. The world's biggest cave and was a mystery until less the 20 years ago. Has two forests with trees 100ft+ tall from where it has collapsed in, it's own weather systems, can fit skyscrapers inside of it... its insane and a hike I am planning to do. It takes 2 days to go from entrance to entrance and only like 1000 people a year can hike it. It's pretty amazing
Thought about the Pacu thing and realised: Whenever you hear a weird story of the sort remember that, although they had clothings, south american natives (mostly brazilian ones) are always freeballing it in rivers
i went to Ecuador and swam off the same docks people were fishing for piranha on and no one had a problem at all.
The guy you said didn’t know about what he was saying is Heiko Bleher, a world renowned fish biologist in the aquarium hobby.
He also discovered most of the trade's fishes, like rummy nose tetras i believe
@@reynardvanderwalt2390 Yup it was named after him, Hemigrammus bleheri.
when he make three false mistakes in 2 seperate videos its not hard to think he doesnt know what hes talking about
@@testaccpunt799 Heiko is around 78, maybe during the time he was studying those things like the knife fish there is no other known specie of fish that can do swim backwards maybe just maybe. And I don't see 3 mistakes only the knife fish one it's just the way he construct his sentences that people tend to misinterpret what he is saying. He is not a strong english speaker so I guess that's one the reasons why his choice of words are not that great.
@@johnkarlogallardo9158 His claim about a fish that evolved "almost 200 million years ago" being older than the dinosaurs is also incorrect.
I'm brazilian and can confirm that they do indeed bite into balls, and for that matter, Candirus actually do enter the urethra too. In our jungles and forests you can still find indigenous tribes, and those people are naked, freeballing all the time, including when bathing in waters with Pacus and Candirus. Those are the main victims of those fish.
I really have my doubts about the Candirus claim, if it were that common I have a feeling it would have been documented more.
And the only time it has been documented, the story did not check out, and was likely a hoax.
@@notapplicable6985
If true, my guess is that nowadays people wear shorts or even full clothes when going into water. European adventurers wearing pants didn't have to deal with that but heard stories from the native folk.
@@notapplicable6985 as a fellow brazilian i can confirm that it's not really common but it does happen, and it's not formally documented because it normally just goes around through oral traditions and such
@@notapplicable6985 i guess being brazilian is some sort of credential for the moment, so hey, i'm brazilian. And there's a video on youtube, from/by Jeremy Wade in which he actually talks about one of the documented cases of a candiru (a blood sucking fish) attaching itself to someone's urethra, and even shows the conserved culprit to the victim
@@UrMom-kp1ji
My dude.
You just said its true cause people told you it is.
If wed go off "Oral tradition" the world would have been ended by some mythical being 20 times over and dragons and wizards would be real, so thats not really what we whanna base our knowledge on.
We bought some glofish a few years ago, and a few of them were those glo-skirt tetras. Little guys schooled with the other skirts, and ended up outliving them. We still have two of them that refuse to die.
I get the Glo-fish hate but it's not really that bad of a genetic change. Using transgenesis, you can insert a gene that produces a naturally occurring fluorescent protein in the fishes tissues and breed them for several generations.
It doesn't significantly change the genome of the fish, except that they glow. It's not that far off of nature, many fish already have bioluminescence anyway.
Weren't they first created to study how chemicals or toxins affect fish?
That last clip was Heiko Bleher, the famous fish aquarist and researcher. Unfortunately he was wrong about the knife fish being the only fish that can swim backwards. Even the greats make mistakes sometimes.
I love his sense of humor so much. So dry, lol.
A lot of these reaction type videos tend to be so forced and overly dramatic, but this guy's super chill.
I’m from Texas and plecos in our rivers are a *huge* problem. The temperatures here are perfect for them (and a lot of other tropical aquarium fish) to thrive, but there’s no predators that can eat them.
There’s many endangered and threatened species in central and south Texas and the plecos are starving out those native species.
Some local areas have had contests in local rivers on who can catch the most plecos to try and limit their numbers, but there’s so much vast rural area and so many lakes here that it may be impossible to get them under control.
Last I read, they think there’s so many now that in some areas they’re breeding.
They're all over the rivers and canals of South Florida too
I was looking around the Berlin Aquarium a few days ago, and I'm happy to say that to me, based on what I've learned on this channel, all the aquariums looked nice, big enough, not overcrowded, stuff to hide in etc, it was really quite cool
The guy you think doesn't know what he's talking about is a really famous German biologist, he discovered hundreds of new species all over the world, his name is Heiko bleher
It really doesn't matter if he's a biologist, people make mistakes and he was wrong
@@PondScummer I'm not saying that he was right.. i just said that he's a famous biologist
For those who are wondering the cave is called Hang son Doong located in viet nam,(note Viet nam is not in china) it was discovered in the early 90s by a local man named Ko Khanh, but wasn't thoroughly explored until 2009. Apparently he forgot the location untill he re discovered it, and that's why it took so long for a proper expedition.
Guppies are awesome they're super underrated because they're so easy to get their hands on, people don't recognize their beauty because they're so easy to see, but just because it's not impossible to own them and they have no hard care requirements doesn't mean they're not special.
I studied oceanography for like 4 years and found AVNJ like 3 days ago and all i know now is
- meg and crabzilla
- seahorse is useless
that’s all you need to know 🤷🏻♂️
that guy you said was a little confused is Heiko Bleher and he discovered thousands (!!) of NEW freshwaterfish in the amazon and all over the world. AND he is 78 years old and still going on missions to discover new species.
ohh and i just watched the rest of the vid and you just said he doesnt know what hes talking about. lmao. kinda funny
@@nic6715
Avnj said he agreed with what Bleher said but disagreed that the fish cannot communicate to eacother anymore. He didn't outright disagree his entire statement or called him ignorant fully. It is understandable to question someone's knowledge when they make a single mistake.
@@samuraijackoff5354 To be fair to Bleher, he isn't a native English speaker.
heiko Bleher (born 18 October 1944) is a German researcher, author, photographer and filmmaker best known in the scientific community for his contribution to the exploration of fresh and brackish water habitats worldwide and the discovery of many species of fish and aquatic plants, several of which carry his name, discovery location or are named in honor of Bleher's family.
Heiko Bleher was born in Frankfurt on Main, Germany. He is the fourth and last child of Ludwig Bleher and Amanda Flora Hilda Bleher, born Kiel. Bleher inherited his passion for freshwater fishes and aquatic plants from his mother Amanda Flora Hilda Bleher was the daughter of Aolf Kiel - "Father of Water Plants" and pioneer of the modern aquarium starting in 1887, who established the world's largest plant and ornamental fish farm in Frankfurt am Main, Germany, in 1900.
At the age of 4, Bleher’s mother took him to Equatorial Guinea, in West Africa on a research expedition and 2 years later he accompanied his mother on a journey throughout Europe collecting plants and fishes. By age 7, he and his three siblings joined their mother on her adventurous exploration trip deep into the South American jungle, where they lived with natives. During this 2-year expedition from 1953 to 1955 his mother discovered many new aquatic plant species, fishes and other animals. At the end of 1958, Bleher's family settled permanently in Brazil and established a water-plant nursery and fish-breeding hatchery called "Osiris" in the jungle outside of Rio de Janeiro. In 1962, Bleher moved to the US and later attended the University of South Florida, studying courses in ichthyology, biology, limnology, oceanography, parasitology, combined with the work at Elsberry's Fish Farm and at Gulf Fish Farm. Two years later, after his return to Rio de Janeiro, Bleher established his own export company "Aquarium Rio" and continued his research and collecting throughout Brazil.
At the end of 1964 Bleher introduced the first new species to be named after him, Hemigrammus bleheri (the brilliant rummy-head tetra) to the aquarium hobby.
Bleher contributed to the rainbowfish species community by introducing Melanotaenia boesemani this being one of the most popular rainbowfish in the hobby and many of the other almost 100 species of Rainbowfish. In 1970 Bleher was the first to collect live Pterophyllum altum from Venezuela
The tetra Hemigrammus bleheri,
Leporinus bleheri,
Bleheratherina pierucciae,
The Cichlid Steatocranus bleheri,
The Snakehead Channa bleheri,
The African Tetra Phenacogrammus bleheri,
Moenkhausia heikoi,
The Rainbowfish Chilatherina bleheri,
The Bromeliad Vriesea bleheri,
Hyphessobrycon amandae is named in honor of Amanda Bleher (1910-1991), the mother of Heiko Bleher, who collected the type specimen and because of her interest in and her knowledge of the freshwater fauna and flora of Brazil.
In 2012, Bleher was accused of plagiarising image(s) of fishes, submitting them as his own for an article for Practical Fishkeeping Magazine entitled "PFK's Definitive Guide to Channa".
In 2019, Bleher was again implicated in another plagiarism scandal whereby a number of images of freshwater fishes were used in his book "Indian Ornamental Fishes Volume 1". The images were in fact the property of a well known blog writer based in India
Yup and he also had a recent discovery with George from the guy he was with on the video. CoralFish12G channel.
I'll never forget the video of the people "returning" the tortoise to the lake. And immediately being told that tortoises can't swim well
5:50 in my state we had a few lakes where they were being taken over by goldfish, and it was greatly impacting the trout and bass populations and destroying the ecosystem all because people dumped their goldfish.
river monster did an entire episode based on pacu introduced into african lakes, biting people including men who usually swim naked in the waters, it was determined that fish had eaten most of the vegetation and was forced to switch diet to meat.
2:20 im more surprised how strong that fucking stick is.
2:52 arapaima got these rock hard heads, And they jump the water and thrash their head 24/7. Bad description but Its a species trait. They've killed people like that, usually in the workers in arapaima farms. The fact that guy just jumped in there with the fish thrashing right near his head is wild. He took a risk
That guy talking about the glofish and other aquarium fish is actually a huge deal in the aquarium fish trade, he has explored deep into remote areas of the world and brought a lot of common aquarium fish into the trade. Even if he doesn’t seem to know quite what he’s talking about from an ichthyology standpoint, his core message is saving as many bodies of water as possible, especially the small, seemingly insignificant streams and creeks around the world because many of them have small populations of fish not found anywhere else. He especially hates how cattle farming and chemical spraying have decimated these small streams and potentially have caused a lot of rare fish species to go extinct without ever being documented
I ever mention how I love your outro sound byte & song. It's such a good transition. Never too loud. Well done.
The man talking about those glofish is actually Heiko Bleher, you should look him up if you don't know him, he's the one who discovered a lot of fresh and brakish water aquarium fish we know today
I don't know how True the pacu thing is but there was a river monsters episode about it
i think the old man was right on the " they cant communicate anymore"
My Idea is that animals communicate with colors things like: iam poisonous, iam an venomous or dangerous.
When all the animals are neon colored they loose this effect and theor nature.
I'd say he's only partly correct. Colors can certainly be important for communication but they aren't the only way most animals communicate. Behavioral communication is equally or more important in most animals.
@@Evan_Schaefering Heiko is very deep into cichlids and yes for them its very important. I have a breeding pair of wild catched Oscars. I can see there mood depending on there coloration that can change dramatic
@@Zozo806 Of course. I don't deny the importance of color in their communication. I just think his statement of "they can't communicate" was probably a bit too broad, although that could just be because he doesn't speak English natively.
Heiko Bleher is the researcher talking about the fish not being able to speak to each other anymore. He has discovered hundreds maybe even thousands of freshwater fish. He was also correct when speaking about the Bichir being around for millions of years. Super cool! 🌟
Haiko Blair has discovered many many fresh water fish including the rummy nose tetras which are so highly coveted in the aquarium hobby
I’m not saying he knows everything but I do trust a good portion of what he has to say when it comes to fish species 💚
AVNJ's vids straight up helps me overcome my thalassophobia, i kinda love it lol
You should do a collab reviewing fish tanks with fish for thought, you guys have some contrasting thoughts at times and I’d love to hear the banter
That arapaima is so polite
10:02 ok if these are manmade why cant we genetically make mice yellow to look like a pikachu, because pikachu is the mouse pokemon, or any other animal to look like a pokemon. nah that probably wouldnt be good at all but would still be kinda cool
For changes like that they need to be useful for science. Glofish weren't originally made for their looks, the glowing genes are used as a "tracker" attached to a target gene. If the fish glows, the genes were successfully integrated into the genome.
“The Shark is coming from INSIDE THE VOLCANO!”
“What’s your favorite fishy movie?”
5:38 these fish are also a problem in the Philippines where I'm from well kind of some people keep them as pets while I saw in one of the science textbook I had in high school some even eat them in the Philippines they're called janitor fish here
7:17 I love how it just goes “scluuup”
you should react to Sherpadesign, he creates insanely good fish tanks, vivariums, terrariums, aqua scapes, etc! it’s a really cool channel
Why is it it's that every time he says "carp" my mind goes to that episode of Pokémon when James buys a Magicarp?
I LOVE Leopard Danios. That's because they have the same shoaling behavior as normal danios, but their fins are flowy so they look like they are tiny ballerinas moving around in a murmur pattern in your tank. I know starlings are an invasive species, but I can't help but appreciate their huge murmurs as they dance around the sky like a dark cloud on acid. Leopard Danios are like that, but only for your aquarium. I can stare at them all day.
Imagine being single with a tank with two kissing fish on valentine’s day and they’re just making out all day.
To be fair, National Geographic has covered this so called "Shark-cano"
I was watching the stream during this (you can see me chat a few times) it was the first time I made it to a stream. Love the videos!
I hope they can stabilize the glowfish genetics more. they are useful for scientists but for the aquarium hobby they need to be healthier
My dog who bites rocks once found a turtle we thought it was rock until it was a turtle we had to drive to the nearest lake and drop the turtle off
Did you throw it in the water? Because you gotta be careful with that as many mistake tortoises for turtles of which then drown in the water occasionally.
@@testerwulf3357 I didn't go on the trip to drop the turtle off this happend around 2013 or 2015
The fish feeding reminds me of my aunt's trout pond. My oldest fed them... and then after that there was one that followed him everywhere he walked. LOL.
The 11:02 'favorite aquarium freshwater' got me! I love angel fish & plecos... I don't know how to feel with what that video said about me😅
We used to have black Pacu. We fed them dog food a while because we couldn’t afford better food and they got real big. Real quick
Yea they probably got fat. Dog food isn't exactly super healthy and is even fattening for dogs, though it depends on the kind with fresh food being way better and dry food tending to be similar to how fast food is for people.
My favorite out of those aquarium fish is the shrimps, they have so many fun colors, but my favorite out of the not-aquarium fish is definitely the lake sturgeon. I just think they’re neat. Love the lil shovel snoots and whiskers.
This video was pretty funny & very educational as always so that's good :3
Hope y'all have a great summer
There are sharks in some underwater volcanoes, but they’re not swimming in magma or anything. Plus water isn’t very easy to change the temperature of, so unless you’re one inch away from the lava it won’t feel too hot underwater. It’s why life is plentiful around hydrothermal vents in spite of the water that exits being in excess of 700° Fahrenheit
found it hilarious when people in chat mistook the music from " Brave Heart " for Titanic or LOTR music at 7:30, lmao
12:12 Oh hey, I think that's that spot in Google Maps that blew up when people thought it was the scene of a murder!
My dad had four turtles as a kid. He took pretty good care of them. Up until the end, when he took them into his backyard and of course you take your eyes off them for one minute and they’ve disappeared. I think about how the invasive turtles I see today are descents of my dad’s turtles.
When I first got an aquarium I got a glofish danio because I wanted all my danios to be unique. My other danios schooled up and interacted with each other, but the glofish swam off on his own.
About two weeks after I got him, I decided to give my fish some cucumber. I got organic cucumber to reduce pesticide risk and was very thorough about washing it and boiling it, and yet my glofish took one little bite and shot straight up to the surface and began breathing heavily, dying the next day. Meanwhile my other danios and my snails never had a problem with cucumber then or since. Danios are famous for being so hardy that they're used in science experiments. There's just something very wrong with glofish.
While bad tiktokers already frustrate me because of their clear hunger for more views, when they just make shit up or spread misinformation, that's a new level of pissing me off
just found this channel, after one video I subscribed, good content :> good job
Thank you very much Mr. AVNJ very cool
Shout out to the fish that just escaped a net and walked back to the water
Love the content!
Never thought i would watch a dude look at fish on youtube but here i am.
Its hella entertaining actually.
What I learned from this video is that there are mutated volcano whale sharks in Mexico. Thanks for the warning.
That fish who escaped was totally thinking “SO LONG, SUCKERS!!!!”
nahhhh those sharks and that whale shark have fire resistance🤣
1:24 llharmony what MH game did you play??
that video of the guy struggling with an arapaima thats literally bigger than him is freaking golden though i love it lol
"Damn thats a big ass crappie"
I'm trying so hard to hold in my laughter
The one where Mr. Blair is talking about fish talking / communicating is from a documentary. It was more of an emotional comment he made. He's a very respected fish biologist who has discovered many species and has named them.
13:18 not me starting to get nervous because "dude, stop talking and hit play. The fish needs to be in the water! Let the fish get put in the water, hes gonna die! Let him get put back and THEN talk! HES GONNA DIE!" and mean it literally... I think it's time for bed... I've been awake too long...
I was doing a project for a class the whole forest thing was actually just a sinkhole that opened up, underneath the sinkhole there was a cave that housed an ancient forest with undocumented bacterial species I believe.
“The fish can’t communicate anymore” He might’ve been referring to how many types of fish show changes in coloration based on age and health plus many will display new color to show they are ready to breed such as Convict Cichlids which i remember my females getting bright orange stomachs to signal to the males that they had eggs and were read to breed again. When you alter the color in this way, This kind of signaling can’t happen anymore.
These tiktoks were a lot less sad then I expected lol
Why would they be sad
1:49 weirdly enough the giant underground forest sinkhole story was seemingly true and documented. It's actually really crazy
ROAST AWAY!!!🙂🙂I seriously WAIT for these vids- but I DID learn a couple of things, too- I wasn’t expecting that, being TikTok & all, but it IS much appreciated!! (The info about classifying a new species, & the fishing PitBull Dogs- all new to me!!)🙂🙂
“I should call her” had me cackling 😂
During the start of the Glow fish chapter I think the guy meant that they were so genetically different that they cant interact with their parent species like they would if they weren't modified
When he says "they aren't able to speak to each other" he most likely mean that in a metaphorical way, everyone knows fish don't speak
Not sure about the kissing fish, but when I introduced a new crayfish to my tank some time back the male ran over and immediately burrito'd her and got down to the mating business
Most animals don’t have a ‘stop eating’ reflex. Like I think it’s just us. But even that doesn’t really stop us.
0:43
Wasn't a River Monsters episode where was exactly about that?
funniest chat message of this one has to go to that person who said "i should call her" when they saw kissing gourami
There actually is a sharkcano and it did actually erupt not too long ago. The volcano is called Kavachi and its an underwater volcano and in a 2015 expedition, they found two different species living in the hot, acidic waters near the volcano. It erupted on May 25, 2022. It’s one of the most active underwater volcanoes in the part of the Pacific where its located and has been erupting nearly continuously since at least 1939. The two shark species observed living there was the scalloped hammerhead shark and silky sharks. Also as a result of how hot and acidic the water is around it, the water is actually tinted orange. The sharks aren't mutated bc of the volcano but they have mutated/evolved to be able to survive in it
Platys are my mom's favorite. Actually yelled out loud from how offended I was that he said it's no one's favorite.
There is exactly one reasonably plausible story of a Pacu attacking a man's little man but that's one person out of millions who go in the water with these fish every day.
14:54 equivalent of alien probing.
The aquarium shrimps community accepts your support, thank you 👍👍
If they remind you of the kissing gourami, you should call them.
Great life advice from Zak.
I loved my pleco as a kid, kept him with my fair-won goldfish in a big ol tall tank
Somebody tries to say something about fish. AVNJ: "Fear mongering"
1:06 In order to preserve my sanity I'm just gonna keep telling myself that this TikTok is satire.
I’ve caught a pacu with meat in a pond at my apartments I was so confused because I live up north near the Great Lakes and they’re not a native species so someone obviously threw him in the pond but later that year when winter came the poor guy died but they put up a great fight and are really cool to look at
Bro I realized that I was over feeding my fish when they looked super pregnant but were all males. I started feeding them once a day and they finally look normal.
fish mpreg
@@udfdsfrgfdrgfd nooooo
the guy you say dont know what hes talking about is a fish researcher named Heiko Bleher and discovered a lot of fish :) .
Yep, which I have respect for that, but he apparently doesn't know everything. We know that the knife fish isn't the only fish that can swim backwards.
Some people released goldfish in a lake near where I live and some of them are killing the baby sockeye salmon 😢