Curse Of The Swamp Creature (1966)

Deep in the rural swamps of Texas, the mad Dr. Simond Trent (Jeff Alexander) is conducting experiments on the local swamp people in an attempt to discover the secret of evolution. When a party of oil surveyors comes upon his isolated laboratory, he decides to take the final step and turn one of them into a grotesque amphibious creature. Also stars John Agar, Francine York and Bill Thurman (as the Swamp Creature).