Shark Zone

Shark Zone is a 2003 American direct-to-video horror film, directed by Danny Lerner and released on October 14, 2003. When a shoal of ferocious great white sharks threatens a small beach community, Jimmy must hunt them down all the while dealing with a group of criminals who sees a priceless treasure that happens to be at the bottom of the ocean as well as in the breeding grounds for the sharks.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.