Bottom Feeder

A group of utility workers are trapped in a series of tunnels which, unfortunately, contain a scientist mutated by his own creation. The creature feeds instantly on a rat, becoming what it has eaten.

Bottom Feeder is a 2007 horror thriller movie directed by Randy Daudlin, starring Tom Sizemore, Wendy Anderson, Richard Fitzpatrick. It holds an IMDb rating of 4.2/10 from 1,006 votes and runs 1h 26m.