There were 150 teeth preserved within the dental record of the shark skeleton. An incredible fossil of an 8 foot long shark - that would've roamed the Earths oceans about 150 million years ago ...
Acanthodians are not at all shark-like in shape, for example they have diamond-shaped scales and spines in front of all the fins,' says Emma. 'But they do have a cartilage skeleton, a shark-like skull ...
The exact number varies depending on the species. The only part of a shark's skeleton not made of cartilage is their teeth, which they're famous for. Since cartilage is softer than bone and teeth, it ...
with 510 species of shark and 650 species of ray, what do they really have in common? They both have a skeleton made of cartilage, similar to what human ears and noses are made of. It’s strong ...