The story kicks off when a military sonar experiment off the Alaskan coast accidentally shatters a glacier, freeing a prehistoric Megalodon and a massive octopus that had been frozen mid-battle for millions of years.
Released in 2009 by the The Asylum , Mega Shark vs. Giant Octopus is a cornerstone of the "so-bad-it's-good" creature feature subgenre. Directed by Jack Perez (under the pseudonym Ace Hannah), the film famously features 80s pop star Debbie Gibson as marine biologist Emma MacNeil and action veteran Lorenzo Lamas as a hard-nosed government agent. Mega Shark vs. Giant Octopus (2009)