There is a scene featuring a dead man with his throat torn out, and also a scene in which a starfish attached to a woman's stomach is cut off, and which includes brief sight of blood on her body.
There is frequent prolonged threat in which people are stalked and threatened by reanimated sea creatures.
There are scenes in which people are attacked and dragged to their deaths by sea creatures. A man is stamped on by a reanimated walrus and people fight of the creatures with improvised weapons. There is moderate and mild bad language (for example, 'bitch', 'piss', 'shit', 'frickin', 'God', 'damn').