In Mega Shark vs. Crocosaurus, a mega shark and a giant crocodile wreak havoc on Florida, battling each other and causing destruction wherever they go. The military, scientists, and government agents must come together to stop these monstrous creatures before they destroy everything in their path.

In 'Mega Shark vs. Mecha Shark,' a massive shark threatens the city of Sydney, Australia. In order to combat it, scientists create a mechanical shark to engage in a battle for survival. As chaos ensues, the fate of the city hangs in the balance.

When an oil platform causes an underwater earthquake, a Mega Shark and a Giant Octopus are unleashed from their frozen tombs. As they wreak havoc on San Francisco Bay, a group of scientists and military personnel must find a way to stop the gigantic creatures before they destroy everything in their path.

When a doomsday device threatens the world, a navy submarine, an undercover agent, and a billionaire team up to stop it. But they must first face off against a mega shark and a kolossus, a giant robot created by a rogue scientist. Betrayal, action, and comedy ensue as they battle to save mankind.