Jawless and Cartilaginous Fish. Become smarter in 5 minutes by signing up for free today: https://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 Diversity of Bony Fish  

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

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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 YouTube 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:
https://sites.google.com/site/swimmin...
https://www.sharksider.com/understand...
https://saveourseas.com/update/chimae...