Sharktopus

Sharktopus is a TV movie starring Eric Roberts, Kerem Bürsin, and Sara Malakul Lane. A half-shark, half-octopus creature created for the military, creates a whole lot of terror in Mexico while a scientist who helped create it tries...
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.