Exploring Jawless and Cartilaginous Fish

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 in the deep sea ecosystem. Watch Part 1 - Bony Fish: https://youtu.be/toKpD9vxYp8 00:00 - Introduction to Cartilaginous Fish 01:47 - Agnatha - Jawless Fish Structure 02:29 - Agnatha - The Hagfish 03:40 - Agnatha - The Lamprey 04:40 - Evolutionary History of Jawless Fish 05:45 - Elasmobranchs - Structure of Sharks 06:24 - Elasmobranchs - Shark Feeding Behaviours 06:54 - Elasmobranchs - The Cookie cutter Shark 07:10 - Elasmobranchs - The Goblin Shark 07:40 - Elasmobranchs - The Megamouth Shark 08:20 - Elasmobranchs - Scavenger Sharks 08:57 - Elasmobranchs - The Greenland Shark 09:50 - Elasmobranchs - Structure of Rays and Skates 10:22 - Elasmobranchs - The Lifestyle of Rays and Skates 10:52 - Evolutionary History of Cartilaginous Fish 11:24 - Holocephali - Structure of Chimaeras 12:30 - Holocephali - Pelagobenthic Lifestyle of Chimaeras 13:05 - Holocephali - Chimaera Feeding Behaviours 13:50 - Conclusion CHECK OUT OUR DEEP SEA WEBSITE: https://naturalworldfacts.com/deep-sea-hub/ 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/swimmingwithdiefishes/riley-s-reef/agnathachondrichthyesosteichthyes https://www.sharksider.com/understanding-cartilaginous-fish-difference-sharks-rays/ https://saveourseas.com/update/chimaeras-the-sharks-forgotten-cousins/