Bottom Feeder (also known as Evil Beast and Mutant Assassin) is a 2007 American horror film written and directed by Randy Daudlin. The film centers on a group of utility workers who have become trapped in the underground maze of tunnels underneath the city where they are skulked and killed by something terrible.

A bottom feeder is usually an aquatic animal that feeds on or near the bottom of a body of water. The body of water could be the ocean, a lake, a river, or an aquarium. Bottom feeder is a general term which is used particularly in the context of aquariums. Biologists often use the term benthos, particularly for invertebrates such as shellfish, crabs, crayfish, sea anemones, starfish, snails, bristleworms and sea cucumbers. However the term benthos includes all aquatic life that lives on or near the bottom, which means it also includes non-animals, such as plants and algae.