The U.S. Navy's special group "Blue Water" builds a half-shark, half-octopus for combat. But the sharktopus escapes and terrorizes the beaches of Puerto Vallarta.
Sharktopus is a 2010 SyFy original horror/science fiction film produced by Roger Corman, directed by Declan O'Brien, and starring Eric Roberts. It is the first film in the Sharktopus franchise.