The Zebra Shark is a small species of carpet shark that is quite distinct in appearance. They have five ridges along their body, a small caudal fin that takes up half their length, and dark spots all over their flesh. During the day, these sharks are quite slow. At night, they are a bit faster, though.
The Frilled Shark is basically a prehistoric monster, as most scientists know it as a living fossil that resembles a massive eel. In 2007, fishermen discovered the eel-like shark, which had razor sharp teeth.