it came from the lake (1980)  

aka Monster (1980)

 Horror 

A rural Colombian village is attacked by a horrible sea serpent, aroused by industrial pollution of a nearby lake. Based on a real event that took place in June of 1971.

Directors: Kenneth Hartford (as Kenneth Herts), Herbert L. Strock (uncredited)

Writers: Kenneth Hartford (story by), Kenneth Hartford (screenplay by) | 3 more credits »

Stars: James Mitchum, John Carradine, Philip Carey