Are shark fins sharp or dull looking?
Well, the sharks fins are not sharp. they are made of cartilage
which the shark is mostly made of. Cartilage is what is in your
nose and your ears. That is why they bend so easily. Not many fish
have cartilage inside them. The fish that do are called, you
guessed it, cartilaginous fish. There is also bony fish and
jaw-less fish.