Exploring Jawless and Cartilaginous Fish
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- Опубликовано: 31 май 2024
- Jawless and Cartilaginous Fish. Become smarter in 5 minutes by signing up for free today: cen.yt/mbnaturalworldfacts - Thanks to Morning Brew for sponsoring today’s video.
Cartilaginous fish and jawless fish are quite different to bony fish. These two groups, also known as Chondrichthyes and Agnatha respectively, build their skeletons using cartilage. A tough but flexible tissue, lighter than bone, that allows them to maintain neutral buoyancy without any need for a swim bladder. In this video we'll take a look at the differences between jawless fish and cartilaginous fish, and discuss their adaptations and behaviours within the deep sea ecosystem.
Watch Part 1 - Bony Fish: • The Incredible Diversi...
00:00 - Introduction to Cartilaginous Fish
01:52 - Agnatha - Jawless Fish Structure
02:34 - Agnatha - The Hagfish
03:45 - Agnatha - The Lamprey
04:45 - Evolutionary History of Jawless Fish
05:50 - Elasmobranchs - Structure of Sharks
06:29 - Elasmobranchs - Shark Feeding Behaviours
06:59 - Elasmobranchs - The Cookie cutter Shark
07:15 - Elasmobranchs - The Goblin Shark
07:45 - Elasmobranchs - The Megamouth Shark
08:25 - Elasmobranchs - Scavenger Sharks
09:02 - Elasmobranchs - The Greenland Shark
09:55 - Elasmobranchs - Structure of Rays and Skates
10:27 - Elasmobranchs - The Lifestyle of Rays and Skates
10:57 - Evolutionary History of Cartilaginous Fish
11:29 - Holocephali - Structure of Chimaeras
12:35 - Holocephali - Pelagobenthic Lifestyle of Chimaeras
13:10 - Holocephali - Chimaera Feeding Behaviours
13:55 - Conclusion
CHECK OUT OUR DEEP SEA WEBSITE: naturalworldfacts.com/deep-se...
I do not own any of the footage. I write the script, narrate, and edit what footage I can find. Footage used belongs to the incredible marine conservation societies of MBARI, WHOI and the Ocean Exploration Institute, along with various other RUclips sources.
Music Used:
Alone We Have No Future by Ludvig Forssell
The Face of Our New Hope by Ludvig Forssell
An Endless Beach by Ludvig Forssell
Fragile by Ludvig Forssell
A Final Waltz by Ludvig Forssell
#deepsea #wildlife #nature #documentary #ocean #marinebiology #science #biology
Bibliography:
sites.google.com/site/swimmin...
www.sharksider.com/understand...
saveourseas.com/update/chimae...
Three cheers for Leo Richards, our generation's David Attenborough! Long may he narrate!
Aw thanks Matthew 😁😁
Nah, no way. He's too somber sounding. David Attenborough has more charisma and energy in his narration. This narrator almost always sounds either sleepy or brooding.
@@washyrose5904 his tone perfectly matches the dark and mysterious subjects... it would be a bit strange to hear a friendly/charismatic narration when looking at something like a hagfish devouring a dead fish. The music, narration and even the slight reverb in the intro is all intentional to create a unique and engaging style of documentary.
@@washyrose5904 - I won't denigrate your opinion as it's something to which you are entitled. But I disagree with you in that I find Leo's style of narration to be both soothing and entirely appropriate to his video compositions. They are of very high quality and his vocal talent and editing skills are an integral part of that high quality. That he doesn't sound like David Attenborough is quite natural as he is _not_ Sir Attenborough and does not pretend to be, though the comparison is in my opinion a very high compliment.
There is room for his style in this medium and I wish him continued success both in his efforts to bring the ocean world into our homes and his studies in Marine Biology at University.
Sometimes I like to listen to you just for how calm and gentle your voice is. Plus I like ocean documentaries
Lamprey are essentially sea leeches, quite interesting how different species resemble each other.
Convergent evolution is cool as heck, homie!
My fav RUclips video right , straight facts ruclips.net/video/XXU7zhDou0I/видео.html
Interestingly, there are also true leeches in the sea. Also, most lampreys are katadromic, while some are living exclusivly in fresh water and also have given up their parasitic lifestyle.
Body plans babyyyyy
But......the damn leeches have no eyes
as an artist student, those ecosystems are a gold mine of trully amazing shapes and ideas... Keep on the great work, your passion becomes ours!
I’d love to see what you create from that inspiration! Find me on Instagram if you feel like sharing your work :)
If horror games had jawless fish, they would be so much more terrifying. Imagine a game like subnautica but with some water leeches. Anyway, great video as always!
The Agnatha Leviathan!
@@NaturalWorldFacts shudders
@@NaturalWorldFacts This sounds a bit like Aboleths and I like it! Also there are true deep sea leeches (daily parasite wrote something about them a few months ago).
Let me address...GIANT. SEA. HORSE. call it the sea dragon giant sneaky filter feeder almost accidentally would be eating you lol.
Subnautica's Bleeder is quite similar
Love your vids so much man. Absolute hits every time. Cant believe you dont get millions of views. Perfect clean editing. Calm ambience. Great voice. Just exquisite my man keep it up.
Thank you so much, that’s really lovely of you. I love making these so it’s great to know they’re well received :)
My son and I have learned so much from watching these videos, and as always this one does not disappoint. The way the narrator explains the subject makes it easy to understand. Great job as always!
I’m so glad you enjoy them, thanks so much for the support :)
Your videos inspire me so much!
When I was little I was often watching a documentary about the fjords in northern Europe. There where many colourful corals and fish. I watched it atleast 20 times bc I was memorized by the beauty. (My parents accidentally deleted it.)
I'm getting the same feeling in your videos. I'm even thinking about studying Sea biology...
That’s really lovely to hear! I remember falling in love with many documentaries like that- just becoming utterly entranced by the wonder and beauty they portrayed. I’m so glad you get that feeling from my vids, and you should definitely study marine biology! I just started a marine bio course at uni and it’s been so much fun.
Something else that’s interesting about shark scales is they also prevent barnacles from attaching since the barnacle can’t find a smooth surface to land on which has also influenced the research into a type of covering that acts like shark scales to place on boats and ships to reduce drag and prevent barnacles from attaching.
I never knew rays had those treelike cartilage skeletons. Amazing.
As always, I'm thrilled when I see a new upload. These videos are so well done.
Thanks so much Emily!
Thank you for uploading. Recently moved into an apt by myself and I am very anxious. Your content relieves my anxiety 10 fold. And keeps me from going crazy. Thank you thank you thank you. I can’t stress it enough
How’s it been so far? I too just moved out for the first time so I know what it’s like to suddenly have all that responsibility. So glad my videos are helping, wishing you the best of luck :)
@@NaturalWorldFacts I tend to find myself feeling very disassociative but other than that it feels nice to get away from my family
@@JEMA333 I hope your dissociation has faded a bit, it's not fun to have. Having music or these videos on helps me hugely
@@golddragonette7795 thank you
These videos make me regret not pursuing a career in marine biology as that's what I majored and got a degree in. I love the oceans and the creatures dwelling within them and these videos really get me thinking. I may not be able to become a marine biologist any more but I still like to create art inspired by the deep ocean and its many inhabitants. At least I can still do that!
You literally made me fall in love with the deep sea 😍 keep doing what you do....you're inspiring lots of people to love and embrace the deep sea and the role of creatures in the ecosystem ❤️❤️❤️ Showing us that it's also beautiful waaaaay down there ....sending lots of love
You’ve made my day, thank you so much for the lovely comment!! Knowing my videos can inspire you to fall in love with the wonders of the deep sea is just incredible, it makes it all worthwhile ❤️
❤️
I love watching these, they feel like Planet Earth but calmer and more bite sized. I’d love to see you explore the creatures and evolutionary strategies of freshwater lakes!
So would I.
Whenever it’s my turn, I choose a bunch of your videos for family movie night. Please don’t ever stop creating such greatness! Cheers 🙂
Death stranding was one of the games that made me fall in love with the ocean, its so cool to see the game that brought me to your channel has circled its way back to me through its music :)
I absolutely loved that game too... The music couldn't be more fitting to a documentary like this, it's so satisfying.
Not many educational channels can keep me engaged on the subject and not getting bored. But your videos are well done and soo interesting and covers categories that make you think " oo, that's a nice and interesting topic, I want to learn more about it " I hope this channel can expand more than sea, maybe cover land animals as well
Thank you so much! I really appreciate that, and I’m definitely going to cover broader topics in future too
this reminded me of my high school zoology class, where we dissected a lamprey for weeks on end... the smell was awful, the lampreys were quite scary, but the knowledge and experience still remains. great video!
Jawless fish: or as an intellectual like myself would call them - mariana maggots
The quality of your videos is truly outstanding.
Thanks so much!!
Thank you for putting all the work you do into these videos, the production value is insane!
Thank you for being so supportive, I’m really glad you enjoy my videos :)
I love the atmosphere of your videos!
And how soothing your voice is.
Thank you so much :)
These videos are so cool to watch. They're both awe inspiring and chill, and it's nice to see an appreciation for the creatures of our oceans, especially deep sea creatures which are lesser known. I also like how you present the creatures as members of the ecosystem and not as evil monsters, which sadly many people seem to do, especially with both deep sea creatures and sharks.
This is a great video, as always.
Just a few notions:
You said "the two main species of jawless fish, the hagfish and the lamprey [...]", while as far as I know, hagfishes are a whole class (called the Myxini) and the lampreys are the other class (Petromyzonti) of the superclass Cyclostomata (which in turn replace the paraphyletic Agnatha), and while there are not many species of both classes, there are some.
The reason that the green land shark is blind is more because of parasitic copepods that attach to the eyes and blinding most inidivuals therefore.
Pelagobenthic is also known as demersal (albeit demersal might be a bit narrower in its definition).
I hope this was helpful.
Definitely helpful and you’re absolutely right with all three. I’ll be the first to admit that when writing such long scripts in such short times to meet my upload deadlines, there are definitely details like this that slip through the cracks. I’m very impressed (and thrilled) there are those perceptive enough to pick up on them.
The copepod in the eye of Somniosidae is something I’ve touched on in previous videos but neglected to mention as the cause of their blindness here. It’s certainly fascinating stuff!
@@NaturalWorldFacts I am happy to be at your service.
And yes, there are so many fasicating aspects about all of those. Have you read about the ammotocotes larva of the petromyzonti? They are filter feeders and some formally katadromic species have become true fresh water species and also lost their parasitism.
Cookie cutter sharks are one of the few bioluminescent shark species. Others include the lantern sharks (as you probably know).
And while most fish species belong to the Osteichthys, they are all equally fascinating.
About the parasitic copepods: Have you noticed the one on the chimera at 12:15 ?
Sometimes you can find parasites and other small organisms if you watch documentaries closely. It is always fascitating what you can spot.
Speaking of very small organisms: Do you know the mesopsammon or interstitial? There are so many fasicnating animals and sometimes whole phyla that live exclusively between sand grains. I am always very fond of mostly unknown phyla (like loricifera).
Most phyla are present in the mesopsammon. And while we know little, there are some truly fascinating things. Like the infauna of brine pools. Or the vertical migration inside the sand of shallow water comunities.
Also the brine channels of the polar regions and their specialized inhabitans are quite interesting.
I'm glad someone brought up these. Taxonomy can be tricky, but with the Greenland Shark, I was like... "Um, you can see the thing in it's eyeball." Great videos regardless.
That Greenland shark was adorable…🦈 9:42
Clicked because I saw my favorite shark, stayed because I wanted to learn more.
Good video.
Just a natural sciences student here, enjoying your content while studying zoology. Love your work and passion!
PS. I dont know if there is already a shop section but if not you should definitely think about hoodies and t shirts regarding the deep
I used to be repulsed by hagfish due to their worm-like bodies and lack of facial features as well as the muccus they secrete in frightening volumes.
Lately I've developed a grudging respect for them; they may never be cute, but they do their own thing and don't need validation from other fish.
Lampreys used to be fierce predators in ancient times, now they feed without killing, I find their lifestyle and the amazing metamorphosis they undergo to be fascinating. In North America they are a devastating pest species who do significant harm to comercially important fish species, yet in Europe they are apparently endangered since Europeans discovered that these fish taste delicious.
Your video only sctatched the surface of these amazing creatures we share the planet with. Showing the vast ecological wealth of our oceans encourages me to think more about my impact on the planet.
thank you
These were discussed in our Marine Vertebrates subject. So fascinating!
Leo has a calling and has found it. I cannot express my gratitude 🙏 such beautiful narration with facts you can trust
Thank you so much holly!! That’s really lovely of you 😊
I can't get enough of this channel. I love the deep sea. So alien and mysterious.
Another brilliant video, keep up with this good work friend
I've never seen the goblin shark "in action" and I have to admit that I shrieked a bit. Startling - terrifying even!!
Wonderfully done video as always, thank you once again for your hard work!
I've been waiting since last week for another upload. I truly love this channel ♥️
So glad I found this channel, thank you for all you’ve done!
Amazing work as always
Thank you 😊
loving your content lately! been listening to your videos while I work and draw and it’s so entertaining and engaging! love the music in this one in particular, sounds very familiar but I can’t place it lol
I absolutely love your videos. They are perfect to put on in the background to relax to. I love your narration and editing, it's truly top notch and indistinguishable from bbc docs and stuff. I'd even say better. Keep it up
Digging the death stranding music in the background! Great content keep it up.
bro your videos are so good. love to see it!
Aw thanks 😊
Love your videos! Quality content, and mesmerizing on so many levels. Thank you for your work.
Love these videos!!! Just wish they were longer!!!! Im definitely a big fan!
I've never taken the time to learn about marine evolution compared to terrestrial evolution. This video got me pretty interested. Thanks!
Leo, thank you so much for continuing in the footsteps of the amazing David Attenborough. My dream job is to be a naturalist, but I decided to go into veterinary medicine because the evolutionary biology field is so niche. These videos remind me of why I love what I do, and make me hopeful for a future filled with new discoveries. Cheers to another fantastic video!
Your voice is so perfect and soothing for documentaries! I just found your channel and am binge watching it now
Your videos are my favorite thing to watch right before I go to bed. Relaxing but super informative and well researched in my opinion. Keep up the amazing work ❤️
I love your voice and content. You deliver things succinctly and with an interesting cadence. And you bring me and others to one of the unknown reaches of our planets... The abyssal oceans, the veritable birth mother of life itself.
Thank you for these docs.
These videos are just incredible. O really appreciate the work put in to them
Thank you so much!! Theyre a pleasure to create :)
I've been waiting for this video! Thanks so much for educating us on the ocean
Aw I’m so glad! I really hope it lived up to expectations
Top notch narrating skills, I’m so glad I came across your channel and have had the opportunity to binge watch your videos and learn so much!!🐌🦑
Leo, you Sir are so underrated, you actually do documentaries that teach and enthral the viewer, reminiscent of documentaries I watched as a child in which you actually learn something. This channel, your way of presenting needs to be seen by more, I am so grateful I stumbled across your channel. I really do wish you nothing but happiness and success, and if you are ever around North East Queensland Australia, I can connect you with someone so passionate about wildlife, she worked for a very long time with crocodiles, but is ridiculously knowledgeable about Australian wildlife being a tour guide for many different companies.
Her dream is to have someone whether herself or others fill the role Steve Irwin left, teaching people about animals, their environment and everything in-between, I think it would be a perfect situation if you wanted to go full movie length style.
Otherwise I cannot emphasise how great the work you are doing is, I will finish with info on the last and most common documentaries that exist:
My father and I switched to National Geographic, the visuals were stunning, the drone footage, helicopter just top notch, then came the animals, they mentioned these wolfpacks and how they mark territory, instantly switching to migratory deer's or something, my father looked at me confused and asked "Did the wolves urinating on trees cause the migration?" we learned nothing about the animals, it was all pretty images.
Unfortunately this is modern documentaries and it's sad, some people genuinely want to learn about specific animals.
Sorry for the long message, much love from Australia, Mark
Thank you so much Mark for the truly inspiring comment. It’s so wonderful to know my films can enthral you in this way. I was always obsessed with wildlife documentaries as a child and would spend hours losing myself in them, so to hear that you have a similar experience with these is just amazing.
I’ll definitely let you know if I’m ever heading to that part of Australia. You and your friend sounds like very passionate people who I’d love to meet and film with if ever the opportunity arises! Keep in touch- find me on Instagram as comments here can sometimes disappear or I may simply miss them sometimes. You’ve really made my day, and I hope we can chat more in future.
@@NaturalWorldFacts Absolutely have a fantastic day, stay safe, happy, and healthy
I love your videos man, keep them up!
You're so talented. Thank you for all your work. I learn every time I watch, which is all the time now.
I love your content so much. The world around us always reminds me I'm just a small part of nature as a whole.
Can't believe you make all of these videos in just 2 weeks. The quality is absolutely wonderful!
Love your videos. I save them to watch before I fall asleep because they are so relaxing. 😌 I love to learn about different kinds of fish
These documentaries are some of my favorite I've ever stumbled across. Love your work!!! I'm a big fan of cartilaginous fish and am glad to see them getting the attention they so rightly deserve
Had no idea holocephali or the megamouth shark existed, thanks for the new weird animals to research! :)
leo coming in with another absolute banger...
👏🏾👏🏾👏🏾
Was not expecting to see the Hagfish here, you now have my predisposed attention.
Always such good content. Absolutely love these videos, especially all the deep sea stuff. 👍
Thanks Steve!!
Great documentary as usual
I love your channel very much! Watching your videos made me grow a passion for sea fauna.
Absolutely love these videos
Wow! That skate skeleton blew me away, and I catch skate (as by-catch, quickly released) regularly during the summer!
always calming and relaxing to watch, and listen to
I usually am never able to sit through a video without clicking off and working on something else while watching or clicking off entirely, but these videos, i could watch them for hours without getting bored, so i thank you.
Thanks for the upload,
Been waiting for this vid!!!! I’m using my phone to comment but I gotta wait to watch it on the big screen can’t wait!
Randomly clicked on this video and just have to say that the narrator is great and their voice is amazing.
Thanks so much :)
I don’t know how you make these great videos…bravo!
Holy Hell is this really a single persons project? I allways though that this was made with a huge team. Damm dude you got my admiration!
Thank you so much!!!! Yup it’s just me :) it gets tough to keep up with everything but I love creating these, and comments like yours are what keep me going.
I would Be very intrested in supporting this channel monetarily. Do you get a good chunk of The monthly fee thing on RUclips?
@@NaturalWorldFacts If theres anyway to get money straight to you that would Be great too! Havent done these monthly support things before
Thank you so much Matias!! The monthly thing mostly goes to me (and RUclips takes a small cut). But honestly your comments alone, and just watching the videos, are more than enough support 😁
Certain voices can make you tune out everything else. This is your thing. You'll educate Millions.
Thank you so much Philip!
The Holocephali are so CUTE! With their huge eyes and front fins going up and down. 🥰
It's only a matter of time until this channel truly blows up with followers. Incredible work.
commenting for the algorithim!! keep up the brilliant work, i love your voice sooooo much!
Ever time I watch a video from this channel,I always learn something exciting and new,and that's awesome
Wish y'all a great day.
needless to say, this was amazing, very enjoyable video. great job!
I’d love to see a video on mating behavior. Like how does the Greenland shark possibly find a mate?
Maybe a faint pheromone trail?
This narrator has such a clear and soothing voice. Could read aloud a book, about the nuclear proliferation of isotopes and make it interesting.
Sometimes this channel is the only thing that can make me sleep, the ambience and narration are so good.... But then of course i come back later in the day to actually watch the whole video 😂
Your voice reminds me of Jude Law when he narrated the Series of Unfortunate Events movie. It’s so calming + super neat videos!
Hey mate, correct me if I am wrong; at 9:20 you said that Greenland sharks are blind due to not requiring eyesight. That is actually in-fact wrong and if you look at the footage you yourself have provided at 9:30, you can clearly see a parasite attached to the eye which if memory serves causes cataracts to form and cause blindness that way.
There is a documentary about Greenland Sharks that actually covers this part of their lives in-depth. They reportedly have great eyesight so long as they can avoid parasites attaching to their eyes.
I am fairly certain that what I have written is correct, but feel free to add your own two cents if I am wrong.
Have a great day
These videos help me sleep and learn but in contradiction are very dark yet interesting. Love it lol
I seriously wish you the best future in being related to tons of future science projects and documentaries. I consider you better than the famous Mr. Attenborough. I just enjoy your style much more. Your passion for science shows clearly and I appreciate how much you care about science, biology and learning about the universe and different ecosystems we all live in. One day if you can It would be so awesome to have a in-depth episode on 2 things. Parasites-and Extremophiles would be such awesome episodes. Same with a, "fungi, mold, lichens, slime" episode. I live in north west Oregon so I'm a huge fan of temperate rainforest ecosystems. Keep up the great work man 👍
Thanks so much to Morning Brew for sponsoring this video and keeping me in the know - sign up for free here cen.yt/mbnaturalworldfacts
One minor nitpick. Greenland sharks technically can see but very poorly, however the majority are blind due to parasites feeding on their eyes. Loving the Deep Sea series.
Pleasantly surprised to hear death stranding music, love the game and love the channel!
Love the narrator and the video!
Very interesting. Thank you.
Love your work, you literally resumed my zoology class
so thoro and informative from someone so young. defo the next david attenborough x
Yo i see you liked my other comment which means you're reading them. I just wanted to say rq what a fantastic job you do with your videos, you've got a future here. Your vids have helped me find a passion and I'm actually studying marine biology at university next year, thanks to you!!! Keep up the good work legend
Aw hell yes! Your comment made my day, I’m thrilled to hear you not only enjoy my videos but have also been inspired to study marine biology yourself. You’re gonna have a blast - I started my marine bio course this September at Southampton and it’s been incredible so far, I can’t wait for you to experience it for yourself. Just came out of a 3-hour session of poking around at jellyfish specimens, and am about to head off to a lecture on hydrothermal vents. Keep me posted with how it goes when you’ve started your course- I always try to keep up with comments, but just in case, reach me on instagram :)
Thanks for being so supportive! Best of luck in all you do!
@@NaturalWorldFacts glad to hear all that man, sounds like a blast. I'm pretty excited myself. Good luck with everything and once again keep up the good work, your vids are such high quality editing and narrating!
wonderful, thank you
Excited whenever I see a whale fall clip!
Leo I have been watching your channel for so long now, and it's amazing how much the quality of your videos have changed so much. You deserve way more subscribers!
Thank you so much for sticking with me and the channel, I really appreciate the support and I couldn’t have come this far without people like you. You’ve made my day with this comment :)
This channel is up there with properly good TV nature documentaries.
I found the video interesting, & beautifully made.
Excellent video my friend. Thank you very much!👌😊👍
I’m so glad you enjoyed 😁
You are a legend, excellent work
Cheers Will :)
babe wake up new natural world facts video just dropped
These videos are absolutely amazing. Whoever is narrating has a great voice, should do some meditation and sleep hypnosis podcasting!