When Crocs Thrived in the Seas
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- Опубликовано: 28 апр 2021
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While dinosaurs were dominating the land, the metriorhynchids were thriving in the seas. But taking that plunge wasn’t easy because it takes a very special set of traits to fully dedicate yourself to life at sea.
Special thanks to these wonderful paleoartists for allowing us to use their incredible work throughout this episode:
Ceri Thomas (including the illustrated the metriorhynchid in the thumbnail): nixillustration.com/
Dmitry Bogdanov: www.deviantart.com/dibgd
Nobu Tamura: spinops.blogspot.com/
Julio Lacerda: / juliotheartist
Franz Anthony: franzanth.com
This video features this Paleogeographic Map: Scotese, C.R., 2019. Plate Tectonics, Paleogeography, and Ice Ages, RUclips video: • Scotese Plate Tectonic... .
Produced in collaboration with PBS Digital Studios: / pbsdigitalstudios
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References: docs.google.com/document/d/1K... 
Наука
- Animal: goes back into the ocean
- Convergent evolution: "So you've chosen to look like fish"
Feesh
Perhaps it's just a fluke
@@Seadalgo log off.. XD
More like environmental adaptation
Like Raptors took to the sky and became Micro raptor 😂
"Until you go extinct" will be a sentence I'll be using more in ordinary conversations from now on...
Every body gangster intill thay go extinct
Looks like I will. I have no kids
I vow to join you in this resolution.
Yes!
Everybody gangstah until The Last of Us video game will become our reality. Only that zombies excluded. It will be dog-eat-dog kill or be killed planet. This pandemic will never end..
Character development is Watching PBS Eons and seeing Blake slowly go from being forced to read puns by Kallie to making his own puns in the middle of the video. Evolution in action, people.
No one can avoid the infectious nature of the pun.
Blessed be puns.
Devolution. Slippery slope to degradation. I like him much better without the lame puns and nauseating cutsie asides.
@@romankozak8728 i bet you’re super fun
@@romankozak8728 I bet you must be party at funnies
I don't know if im more impressed by the evolution of crocs or by the evolution of Blake's arms during the pandemic.
HAHAHA!
Yeah, right. He is getting dangerously ripped. Probably from carrying a lot of fossils and rocks
Dudes hella jacked
It's kind of wholesome to see people become fitter when their job is being filmed for the internet. I remember when all the league of legends pros were either obese or skinny. This streaming environment we're in encourages nerds to get physically fit way better than comic book superheroes ever did.
I've been watching this channel for 2+ years and it great to see the channels progression and his ^ ^
"It can be hard to find your sea legs, but once you do, it's smooooth sailing...until you go extinct."
Best summary of evolution ever.
Lol
yes baby
It makes me worry about our lovely whales.
@@benjamindavidovichwaals2899 ??? Bro go outside
@@exessen1684 why, my cartoonish friend?
I first read the title as ‘crocs thrived in trees’ and thought we were in for a really wild episode 🤯😂
Weren't we?
@@LuanMower55 It was an great episode don’t get me wrong, but the idea of crocs in trees was so out of pocket I was really confused for a moment.
LOOOOOOOOOOOOOL
No you didnt
@@Gblonkers Ive been studying/working for several hours straight at this point my brain was mush reading the title.
"If I had a nickel for everytime a crocodile relative transition to life on water I'd have 2 nickles which is not much but it's weird that it happened twice."
You would have at least three, maybe four. Two groups of Triassic pseudosuchians, Qianosuchus and the diverse phytosaurs, were semi-aquatic .It also is debated whether the metriorhynchids last common ancestor with crocodilians was semiaquatic or not.
I understood that reference.
Dr crocinsmirts
Crazy because whales were land/sea animals and at 1 point and looked alot like crocs and were labeled under whatever the prehistoric name was for crocs lol
@@kaylaedwards4117 I think you’re referring to Ambulocetids
“When in doubt answer is usually dinosaurs” thank you for this insight I will keep this in minds during finals
Make it even better by using the Latin version: "In dubio pro dinosaurum." 😉
Q: What is 1+1?
A: Dinosaurs
Q: Are you a Virgin?
A: Dinosau....wait
Q: What is the capital of Assyria?
A: Dinosaurs
Q: What do we call the old computer systems from the 1950s / 1960s?
A: Dinosaurs... oh, hey!
Marine reptiles: "Finally no dinosaurs that hunt us and still food"
Dinosaurs: [Spinosaurus started to adapt into aquatic environment]
Marine reptiles: "Damned!"
Geography: i gotcha ya back marine reptiles
@@Abyssaracnis Spinosaurus: dammed!
crocs now: "who's laughing now lizzards!"
Marine dinosaurs are marine reptiles...
@@kekeke8988 I think they meant marine reptiles, other than dinosaurs.
I'm trying to become a PALEONTOLOGIST when I'm older, and one of the first creatures I wanna study is these Sea Crocs!!!
Get good grades!
Thats awesome man!
100% go for it. Any job in the paleo world is _very very_ worthwhile, and loads of fun. You gotta study smart and hard, but it's absolutely worth it.
Same hear bro
same
Crocodiles are so versatile that we shoud be about to discover a extinct species of flying crocs.
Only 7 % of the fossil record has been uncovered, so that’s possible.
What, whale-like crocs, horse-like crocs and regular crocs aren't enough for you?
@@edweefication It’s called EVOLUTION.
@@edweefication Precisely! They were everywhere!
@@edweefication hooved croc already existed, so...
I still miss the "and Steve" at the end. Steve, you are remembered!
@Din Do Nuffin died in a meth overdose. Sad stuff
@@sethbuck2013 damn
I thought they where talking about the crocodile hunter. I'm not familiar with this channel
@@sethbuck2013 who died in the meth overdose?
@@Twinklethefox9022 Steve is a former patreon
Earth's past is such a great place to mine for odd D&D monsters.
Dnd underwater...
So true!
Love to come back to these videos every few months to see just how jacked this man can get.
Absolute unit.
That's evolution in action
He’s papi
Paleo daddy
He his preparing for his aquatic return
I was gonna comment that the shirt looked awesome on him and he should be proud to wear it lol
Croc evolution is crazy, especially the fact that modern crocs changed very little over hundreds of millions of years.
Yet they are ugly if worn with socks
They didn't, the caprosuchus ran on hooves and the armadillosuchus lived and burried in deserts, not to talk about this fat oceanic crock
Kinda of misnomer as the lineages that would give to rise modern crocs first appeared 80 million years ago (we're counting some of the extinct land dwelling lineages). You know who else existed around that time? Waterfowl & Fowl!
@@kagamijunichirou9346 they're ugly without socks too. They just scream "I've given up on looking good ever"
@@i.m.evilhomer5084 waterfowl? Really
i didn't realize I was an eons superfan until I understood all of the convergent evolution on-going jokes...
Loving this series, it gives me the same feeling as reading old national geographic books at the school library and seeing all the nice illustrations and learning so much about our common past
Some Rando: How'd you spend quarantine?
Random Researcher: I looked at a bunch of ancient marine crocodile skulls and wrote a paper on it.
And worked on my biceps...
When he said it was published in 2020 I couldn't help but think about this.
A worthy use of your time!
@@harrietharlow9929 For the moment or so I considered it, I'd say so.
Paleontologists did that before COVID came around and caused quarantines. So many museums have such huge back collections collecting dust, some not even removed from their protective jackets, that I've hypothesized that paleontologist could easily spend their career making new discoveries and writing papers without ever having to go into the field and just digging around the back collections of museums.
"You croc our world", that was horribly wonderful.
Love all the stuff you do.
Dude this video is great but I don't think I'm ever gonna get used to not hearing Steve's name getting called at the end of the vid
i miss "and my boi Steve!"
Happy to not be alone in this.
Who's Steve and what happened to him?
Mosasaurus, liopleurodon and other marine lizards definitely went to dominate the oceans. Super spooky and yet cool
Yeah. I get retrospective thalassophobia just from thinking about it.
Do you think that carnivorous hippos of today are more conforting.
Liopleurodon wasn't really a dominant species they were pretty small compared to other larger Pliosaurs like Kronossaurus and Predator X.
@@shafqatishan437 Yeah liopluredon average size was around slightly larger than a great white
Seeing Blake throwing in some puns like "Metriorhyn-kids" one is why I'm here. Well, not only but it's a huge plus.
3:45 that Magyarosuchus was certainly hungary for that other fish
Puns are alright by me, Budapest to many others!
7:29 "Aand not getting eaten by a hungry dinosaur was a plus too."
Mood.
Marine crocs are very underrated. Glad to see a video on them
Aggiosaurus looks deadly and looks like it would fit quite well in a monster horror film.
New Eons Wooooooooooo!
And it’s on crocodilomorphs, my favorite archosaurs~
*Magyarosuchus*
Hungarians: "omg our country is famous"
Bojler for sale.
Blake finally embracing puns just made my week
yes i was waiting for this now we got hooves and flipers
Land mounts and sea mounts.
2:20
Crabs: Ah a worthy opponent!
Our battle is going to be legendary
That one picture gives them stubby little teddy bear arms! It's terrifying, but derpy!
@Redux Studio Skyfall I just got vividly reminded of the t-rex from meet the Robinsons:
"I have a big head, and little arms! And I don't think this plan was well thought out!"
Why air breathers took over so many niches in the ocean is one of the most fascinating parts to me. It seams that things with gills that don't have to surface and can stay down as long as they want would have the advantage I know there were Whale size fish at one point. I want to learn why.
Air got higher density of oxygen that can fuel even high metabolism of marine mammals. I'm guessing air breathers got advantage in that they are more energetic
@@entropy8634 the fastest swimmers in the sea are still fish: like tuna and swordfish
@@klas666 they still fall prey to air breathing orcas
@@entropy8634 but orcas can't outrun tunas even at short bursts, so it's hard to call fish less "energetic"
@@klas666 fair point
4:04
You know paleontologists are cool guys when they use the Kinder egg surprise container within a drawer full of bones of extinct animals 😂😂😂😂
🤦♂️
Pour one out for Steve. Or, if you're a secondarily aquatic reptile, then empty your salt gland.
Oh and when is Blake going to drop his workout playlist!?
I'd like to see episodes about what I've heard called "wastebasket taxa:" the group designations given to stuff we tend to toss organisms into when we just don't know where to put them (protists, worms, etc.). I liked the Tully monster episode and this is like the flip side of that.
Also an episode about how fungal mycorrhizae acted as roots for land plants until they evolved their own, and how plants and fungi still rely on each other (including mycoheterotrophs!).
It’s simply amazing how old earth is...that these creatures can over 100s of millions of years evolve into so many different species...on a slow day to day basis. Great video
You guys should do a video on the evolution of elephant trunks. Like, how did that come about? What did the ancestors look like, and why did the trunk give them an advantage?
These crocodiles simply specced enough evolution points into extra aquatic mobility.
And these are my favorite crocodilians now
The horse one will forever be #1 in my heart. Gonna ride one of those babies into battle one day.
I love that this incredibly specialised, deadly aquatic predator has those little arms.
Just thinking about being stranded in the open ocean with these creatures around gives me goosebumps, just looking at their size will shake me to my core.
I really appreciate that you guys credit artists for their paleoart during your video.
I see a PBS Eons sea monster video, I click on it.
It would be so amazing to see how eyes 👀 evolved
PBS Eons has been getting me through the lockdown for over a year. Thank you. 🇮🇪
The Crocs thrived around us since the time of the dinosaurs🐊🦖
Yes and no depending on definitions used. If by "Crocs" you mean modern crocodilians then no they only appeared late into the Cretaceous other animals had previously occupied this ecological niche but they disappeared perhaps victims of the Cenomanian-Turonian extinction event or some other climatic/ecological factors.
If by Crocs you mean crocodylomorphs then yes as they were a diverse clade of metabolically active archosaurs that survived the Triassic Jurassic mass extinction and rediversified in the Jurassic remaining quite diverse up until the KPg boundary where all but Dyrosaurids(lasted up to the Eocene), Crocodilians(still extant) and Sebecids(lasted up into the Miocene) went extinct.
And if you extend the definition of "Crocs" beyond crocodylomorphs to the larger pseudosuchians then they ruled before the Dinosaurs with the crocodylomorphs being the lucky small survivors not unlike how if you extend our mammalian linage back to our Permian therapsid relatives you can say they ruled the Permian leaving only our small ancestors.
In these two cases of comparison above the extinction survivors of these two once diverse groups would have been able to fit in the palm of your hand when fully grown. Extinctions and megafauna don't really work together well. The only megafauna to cross that boundary on land was the dinosaurs
When it doubt then “volcanoes did it” seems to be a running theme in this series
Fantastic video, as always! Fascinating how going back to the sea was a solution for so many creatures.
Also, that giggle at the pun about the kids. Pure serotonin :D
The Salty is huge, and very similar to the Nile crocodile. It is sea going but prefers estuaries, and is seldom found in completely fresh water.
I always enjoy Eons episodes even with the awful puns and bad jokes.
Thanks for posting. Virginia
Although there are lots of seriously good scientific channels on RUclips, this one still is, and will continue to be among my top five favorites. ❤
Thank you PBS Eons! I'm doing research on Metriorhynchidae and Gracilineustes and this was incredibly insightful. Best, Enchiridion
Timing difference between our ears is only a small part of how we pinpoint the direction of a sound. The folds in our external ears affect different frequencies in different ways according to the direction the sound is coming from. Our brains compare the resulting frequency profiles and determines sound direction that way. Owls, who don't have external ears, use asymetric ear canals to produce the same effect. This is also why it's so hard to determine the direction of a pure tone sound, they do not provide the required profiles over a wide range of frequencies.
GREAT VIDEO
GREAT CROCS...
and GREAT ARMS BLAKE 💪
he is truly doing some hardcore gym bro quarantine training to get as huge as his anime idol Goku
I was recently told by a Creationist that 'the Fossil record is so incomplete as to be useless'. Maybe you could make an episode that explores what the Fossil record actually comprises, so if this kind of comment arises in the future, I'll have somewhere to point them to!
You can't have a debate with a Creationist. A real debate requires that both sides have conditions under which they will change their minds. Creationist will not budge from their positions.
The fossil record could be even less incomplete and it wouldn't matter: DNA already shows us that evolution happened. The fossil record is just a nice extra of cool "photographs" that were taken from time to time.
But as already mentioned by others, you can't debate a creationist.
If it's a fossil than there's "no transition shown."
If it's genetic relationships than it's "the proof of God's creation" or "bananas share 50% of their DNA with us too!"
If it's an observable fact in real life than it's "still x or y and pArT oF iTs OwN kInD."
OMG puns overload! Thank yoy Blake, our pun overlord!
Because of this channel I got interested in Evolution 👍🏻😎👍🏻
You better hope that evolution won't get interested in you.
@@lonestarr1490 *develops skin wings and night vision*
6:44 Funny as hell. Great episode by the way even though I love almost all your episodes. Don't forget the evolutionary history of pinnipeds and tyrannosaurids and maybe the seabirds too
...Did every science channel on RUclips collab to make sure they all talked about crabs-that-aren't-crabs today? This is the third upload I've seen today mentioning it - first from CrashCourse, then SciShow, and now Eons!
To be clear: I have no problem with this. I love crabs-that-aren't-crabs. I just also love conspiracy theories. 😂😂😂
Well… Hank was/is a host in all of those channels. Coincidence…?
Crocodiles and their relatives are one of my favorite things to learn about!
I didn't know crocodilian osteoderms were used for thermal regulation as well as armor. That little tidbit almost passed me by. Neat.
You guys are awesome. How about a video going over some of the major OR minor inaccuracies in Jurassic Park? Or going over any science that was "true" in the 90s when it was made and what we have been able to prove or disprove since??
Man, these ancient creatures look so cool. How come we don't have monsters like these lurking around nowadays? haha
I think it is really interesting how different animal groups adapt niches from one another. Very different body systems coming to similar solutions. Marine mammals closely resemble marine reptiles despite having very different approaches to heat generation for example. Convergent evolution is amazing at finding practical solutions for these groups.
Been watching PBS for over 20 years
I like how excited this dude gets, its wholesome :)
Prehistoric crocodilians sure were epic
Also hope u have a good day.
I'm so happy that there are channels like this to help us get more fresh info on dinosaurs and other species of that time. Especially after almost 30 years since walking with series aired and the information from there is not as fresh as it was in our childhood
I at one point came within 5 feet with an 18 foot American Crocodile in the Everglades. Probably the second most knuckle-headed thing I’ve done involving Crocodilians. The most knuckle-headed thing I’ve done involving a Crocodilian was stick my arm within chomping distance of a seven foot American Alligator so I could take a close up photo of it’s snout.
Can you please do a video on the decline of Perissodactyls and the success of the Artiodactyls? Thank you.
The perissodactyls tapired off, but the artiodactyls camel long way.
@@pierreabbat6157 under-rated
after quarantine is over you recognize who was hometraining and who wasn't 😁
Me: "Oh man, I think I've subscribed to a few too many channels. My backlog is way too long."
PBS: "So we have a new channel that you might be interested in."
Me: "Okay, maybe one more."
Well, i was right(on the preview post). This croc is horrifying, yet extremely interesting! I can't believe i didn't know that fully marine crocs existed!!! That's why i love this channel! Even a paleo nerd like me learns something new and fascinating each video!
Is this video trying to tell me we can have significant marine reptiles again if we bump sea temperatures up a few degrees? I think I've found my motivation to become a supervillain.
I mean you would essentially kill off most of the available food sources in the ocean if you did that so you'd be bringing them back just to starve them.
I never heard of such a thing before the video. Thank you.
That snorkeler's manbun was awesome looking underwater!
This is my favorite kind of Eon’s Content!!
I'm glad I'm not swimming in the seas where those Cros were
Are you guys spying my reading list? hahahahahaha
I just finished reading a book about crocodiles yesterday and started another one today
First was the video about the walruses, which coincided with the reading of the book "Walrus" by Reaktion Books haha
Aah finally a prehistoric creature Eons episode !
A PBS Eons video with a narrator that pronounces niche properly? Never thought I'd live to see the day
Hey Eons, why haven’t gills re-evolved in marine animals?
Air breathing is actually pretty useful because it's way easier to extract oxygen from air than from water. That's probably why. Though there could be examples of fully air-breathing animals becoming water- breathing that I'm not aware of.
“If you’re an eons super fan” well I also took bio 2 ☺️
Ahhhhh Metriorhynchids are some of my favorites. Thanks for this!
One has to wonder WHY secondarily aquatic animals so often seem to take the top spot in the ocean's food chain.
Lookin fit, man! Keep it up!
Also, thanks for another cool natural history lesson.
i miss steve (U^U)
Ichyosaurs: adorable
Plesiosaurs: nightmare fuel to the most wicked degree
Imagine going to that period and watching those large reptiles move on land and in waters.
So this is the episode where Blake finally gives in to the paleo-puns? It was only a matter of time ;)
Also: Why no marine non-avian dinosaurs?
Also also: Great episode, I was hoping you would cover this topic at some point. I've been curious about it ever since I learned that the marine reptiles you tend to come across in documentaries (plesiosaurs, mosasaurs, ichthyosaurs etc) weren't closely related to each other at all.
Lookin swole bro
Niche partitioning and convergent evolution is so dang cool!
How evolution works is beyond me. How do multiple animals evolve in the same ways? That’s borderline miracle-like
Banker: What are you doing? Are you robbing this bank!?
Blake: Dinosaurs.
Banker: Seems legit
the metriorynchids are my favourite prehistoric marine reptiles.
also funny enough, Im working on a new video that will feature some metriorynchids and some other marine creatures, its not finished yet but im Realy excited to show it to you all went im done with its, its gonna be my best video of my channel; hopefully😁
Crocodiles really thrived during the Mesozoic!
Oh, wow. I straight up was wondering just now when the last time I saw a new Eons vid and then this pops up in my recommended.
Hi I’m a crocodile, thanks for introducing me to my dead relatives 🥺🥺🥺 I aspire to be fully aquatic too...
I can say with a large amount of confidence that 90% of people who watch this channel had their first experience with Metriorhynchids with Chased by Sea monsters
I’ve no idea what your talking about
@@MrJimheeren then you’re not part of the 90%
I'm liking this video because of the giggle after the pun about kids. Love these videos.
Blake's goofy laughter at his own jokes could be the best thing on the internet