Alligator II: The Mutation Movie Poster / Blu-ray / DVD / Cover Art Image
[ Movie Page: Alligator II: The Mutation (1991) ][ Trailer ]
Tagline: It erupted from the bowels of the city in a lethal frenzy.
A giant alligator runs riot in a small town with a lake connected to a sewer/drainage system. Typical plot; nobody believes the sightings until lots of people have been killed.