Ancient fish had synovial joints, challenging the idea that flexible skeletons evolved on land. Fossils and modern fish show ...

Analysis revealed cavitated joints in the cartilaginous fish, but not in lampreys. Additionally, the cartilaginous fish exhibited certain proteins and developmental processes that are shared with ...

Cartilaginous fish Although little is known about mating systems in sharks and other cartilaginous fishes, there is evidence that some species such as tiger sharks (Galeocerdo cuvier) could be ...

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,’ ...