“The Reef” is a shark movie, one that largely revolves around people treading water miles from any boat or safe harbor. Sound familiar? Based on premise alone the comparison to “Open Water” is inevitable. Based on the fact that there is a shark in the movie I am professionally obligated to use the word “Jaws” at least once during this review. Shark movies don’t need to be fancied up to register with most of us. Everything they expose in us is deeply primal and rooted in the unknown. For these reasons using a large carnivorous fish as the prime mover in a horror movie seems like an easy get.