Hybodus

Hybodus or Hybodont is a shark that lived alongside the massive Leedsichthys, the ferocious Eustreptopondylus, and many other beasts of England. It is about 2 meters or 6-7 feet long, and also had a sharp, piercing bite into anything's flesh. This shark had a weird nose, like Megalodon, and the normal fins. It survived the Permian- Triassic extinction event of 252 million years ago.