Zaat (Dr. Z) (Attack of the Swamp Creatures) (Blood Waters of Dr. Z) (Legend of the Zaat Monster) (Hydra) (1971)

A mad scientist unleashes his master plan: to transform himself into a mutated walking catfish, and gain revenge on those who have spurned him. His plans go wrong, and he becomes tempted to kidnap a nubile young woman to similarly transform her so that he can breed.