"Only such perfectly preserved specimens allow researchers to draw conclusions about the living conditions of the ray at that ...

Old Fish Fossil Suggests That Humans Don't Share a Common Ancestor With Sharks, Claim Researchers In 2015, researchers ...

Sharks and rays have populated the world's oceans for around 450 million years, but more than a third of the species living ...

The Devonian ancestors of fishes living today belonged to two main nonarmored groups. The cartilaginous fish, so-called because cartilage formed their skeletons, later gave rise to sharks and rays.

But what did they evolve from, are they 'living fossils', and how did they survive five mass extinctions? Sharks belong to a group of creatures known as cartilaginous fishes, because most of their ...

But we’ve learned a lot about the history and evolution of sharks from their fossilised teeth. ‘We think early sharks developed a cartilaginous skeleton because it better suited their lifestyle,’ ...

Rising CO2 levels threaten sharks and rays - our report in category News in DiveInside - the fresh online magazine of Taucher.Net ...

A group of whitetip reef sharks (Triaenodon obesus) resting under a table coral off the coast of Indonesia, one of the world's current ...

This made us wonder whether the cartilaginous outer ear may also have arisen from some ancestral fish structure." The first clue toward cracking this mystery was the team's discovery that gills ...