Two sisters (Mandy Moore & Claire Holt) decide to have an underwater adventure on their Mexican vacation. In the safety of a cage, they’re submerged to marvel at sharks swimming around them. Of course, everything goes wrong and they spend the rest of the movie trying to stay alive. The plight is presented with workmanlike skill, maintaining interest and quiet apprehension without much real tension. There is one good jump scare, but the attack sequences are often a confusing blur and the twist ending is disappointingly dumb.
(3 / 5)