Sharks are a group of fish with skeletons made from cartilage instead of bone ... Read on to find out about the biggest sharks in the world. The whale shark, Rhincodon typus, is the largest fish in ...

because most of their skeleton is made from cartilage rather than bone. The only part of their skeleton not made from this soft, flexible tissue is their teeth. The group includes the more famous ...

The difference between a shark and other fish: Unlike bony fish, sharks, rays, skates, and chimaeras are cartilaginous fish, meaning their skeletons are made of cartilage, not bone. Their skin is ...