Mega Shark is a Megalodon much bigger than the real counterpart and its relative the great white. It is a very powerful monster that have been frozen in ice with the giant octopus in 10 million years. But then the ice melts and they are both free. They starts to attack many places such as San Francisco, a oil plate and more. Later they both fight to death but Mega Shark won. In next movie it meets Crocosaurus, a giant crocodile. Unlike the first battle, it ended in a stalemate of him and the croc falling into a volcano.
Mega Shark looks like the Great White but is much larger. It seems to be invulnerable for missiles and other weapons. Despite being big, it can jump very high limits and can attack a plane.