There is a extinct shark called Megalodon.it lived 45,000 million years ago! Fact:Its teeth are seven inches long!I don't no how it died and I bet I will never find out!

Sharks don't have fish scales!What kind of scales do they have then?They
have:Dermal denticles.Pretty cool huh?There scales are't even smooth!If
you rub them the wrong way you will get a cut!