The Cave Serpent appeared in the 1933 movie called King Kong. The Cave Serpent is a large snake-like creature with a short neck. However, it has a thick body with four fin-like flippers and an extremely long tail, indicating that it may be an Elasmosaurus, a type of carnivorous plesiosaur, rather than a giant snake. The depiction of the Cave Serpent in King Kong resembles the 'head on the wrong end' version of the Elasmosaurus, a depiction that was later proven to be false.