The California coast is terrorized by two enormous prehistoric sea creatures as they battle each other for supremacy of the sea.

In search of a new energy source, Russia accidentally reawakens the Kolossus – a giant robot doomsday device from the Cold War. At the same time, a new Mega Shark appears, threatening global security.

When another Mega Shark returns from the depths of the sea, world militaries go on high alert. Ocean traffic grinds to a standstill as everyone lives in fear of the insatiable beast. Out of options, the US government unleashes the top secret Mecha Shark project — a mechanical shark built to have the same exact characteristics as Mega. A pair of scientists pilot the mechanical creature as they fight Mega in a pitched battle to save the planet. But when faulty mechanics cause the Mecha to go after humans, the scientists must somehow guide Mega to Mecha in hopes that the two titans will kill each other – or risk untold worldwide destruction.

A reporter, cameraman, and some petty thieves are stranded in a boat out on the ocean. The only thing that stands between them and their lives is a 50-foot prehistoric megalodon shark. They must all pull together to survive.

A ferocious, prehistoric Megalodon has returned to the surface, terrorizing a group of oil rig workers and members of a local fishing village.

A military vessel on the search for an unidentified submersible finds themselves face to face with a giant shark, forced to use only what they have on board to defend themselves from the monstrous beast.

Shark expert Neil Hammerschlag and a crew of researchers search for an elusive hammerhead shark.

Oilman Paul Sturges’ idyllic family vacation turns into a nightmare when they encounter a ferocious megalodon shark that will stop at nothing to protect its territory. Stranded and under constant attack, Paul and his family must somehow find a way to get his family back to shore alive before it strikes again in this epic battle between humans and nature.