Mega Shark Vs Giant Octopus (2009)

From the depths of primaeval times and the ever-frozen Ice Age, two deadly apex predators--a voracious Megalodon shark, and a mighty giant octopus--emerge from their icy Alaskan prison after an experimental U.S. Navy exercise. As a result, the flash-frozen adversaries immediately pick up where they left off, causing destruction and mayhem in both Japan and California. Now, under those dire circumstances, the marine biologist, Dr Emma MacNeil, and her mentor, Lamar Sanders, will have to join forces with the Japanese scientist, Dr Seiji Shimada, to come up with a plan to stop the gargantuan underwater killers. However, who can stand in the way of the all-powerful prehistoric beasts?