This is a disambiguation page — a navigational aid which lists pages that might otherwise share the same title. If an article link referred you here, you might want to go back and fix it to point directly to the intended page.
The skeleton of the shark is very different from that of bony fishes such as cod; it is made from cartilage, which is very light and flexible, although the cartilage in older sharks can sometimes be partly calcified, making it harder and more bone-like.
The shark's jaw is variable and is thought to have evolved from the first gill arch.
Instead of bones, sharks have cartilagenous skeletons, with a bonelike layer broken up into thousands of isolated apatite prisms.
Feeds |
Contact