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Mega Shark Versus Giant Octopus is a monster/disaster film by The Asylum, released on May 19, 2009, in the United States and on August 7, 2009, in the United Kingdom. It was directed by Ace Hannah and stars singer Deborah Gibson and actor Lorenzo Lamas. In mid-2010, The Asylum updated their catalog with Mega Shark Versus Crocosaurus, which was released on December 21, 2010. The cast and director of Mega Shark Versus Giant Octopus did not return in the sequel; instead, the film was directed by Christopher Douglas-Olen Ray and featured a new cast led by Jaleel White, Gary Stretch and Robert Picardo. The third chapter in the series titled Mega Shark vs. Mecha Shark released on January 28, 2014, with Gibson reprising her role as Emma MacNeil.
The California coast is terrorized by two enormous prehistoric sea creatures as they battle each other for supremacy of the sea.
When the prehistoric warm-water beast the Crocosaurus crosses paths with that cold-water monster the Mega Shark, all hell breaks loose in the oceans as the world's top scientists explore every option to halt the aquatic frenzy. Swallowing everything in their paths -- including a submarine or two -- Croc and Mega lead an explorer and an oceanographer on a wild chase. Eventually, the desperate men turn to a volcano for aid.
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.
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.