I watched The Beast from 20,000 Fathoms (1953), a 1953 Warner Brothers film based on the short story, The Fog, by Ray Bradbury (Fahrenheit 451, The Martian Chronicles, The Illustrated Man) on Svengoolie. This a Ray Harryhausen stop-motion creature, the fictional Rhedosaurus, inspired by King Kong, the head of a T-Rex, the body of an Iguana and crocodile features. In the movie it appears to be 200 feet long but the model was actually only 30 inches.