The Twilight People (1972)

A diver finds himself abducted and brought to a remote island ruled by a deranged scientist. There, he encounters a bizarre world filled with his captor's grotesque experiments—creatures that are part human, part animal. As he navigates this strange landscape, the diver must confront not only the scientist's twisted ambitions but also the terrifying beings that inhabit the island. His struggle for survival becomes a race against time, as he seeks a way to escape the clutches of both the madman and his monstrous creations.