Curse of the Swamp Creature

Dr. Simond Trent experiments on the local voodoo-worshiping black "natives" in an attempt to discover the secret to reversing evolution. When a party of oil surveyors comes upon his isolated yet strangely suburban-style home he decides to take the final step and turn the duplicitous female leader of the expedition into a grotesque and virtually indestructible amphibious "Fish Man"