Evolution of Sharks

For millions of years sharks have been top predators in the seas and oceans on Earth. This short documentary discusses their origins and evolution, an amazing journey which saw them survive through four of the great mass extinction events.

This film was made for the class History of Life at NUI Galway

An Amity Island production: Freya Connolly, Jonah Faulkner, Hayleigh Gray, Ciara Myles & Eva Turley

Enjoy!

[Dmanfp]

Good overview

0:25 Should be Carboniferous, not Cambrian (vertebrates were just arriving in the Cambrian, why i don't gravitate toward it lol)

1:27 Interesting thing most people probably don't notice or overlook: Cladoselache, unlike modern sharks, has a terminal mouth (mouth at tip of its head/ snout). Most, if not all(?) modern sharks have mouths below the terminus. I've heard some people think it's because early modern sharks were benthic eaters, maybe or maybe not... But then again maybe it had more to do with the loads of detecting organs modern sharks use around that region & mouth "was pushed" downward maybe (also Cladoselache still had jaws attached to it's skull iirc, unlike the advanced modern predatory sharks that can forcefully protrude their jaws/ fairly loosely attached by ligaments. Not too keen on Devonian vertebrates, but yeah for sure it resembles a modern shark in its general form, amazing in a way imo yet all super successful high speed marine predators seem to evolve that general torpedo- body shape

[mikeygordon]

Leopard shark is the cool shark that living surrounding the coral reefs.Leopard shark make the coral reef as their homes for avoid been eaten by the predators.

[mikeygordon]

The shark that live in the carboniferous period is the stethacanthus, orthacanthus, xenacanthus, cladoselache and edestus.

[PaulTheSkeptic]

Sounds like good history battle music. "The Visigoths are at the gates! AHHH!!!" Du du. Du du. Du, du, du, du du.