Attack of the Crab Monsters is a 1957 independently made American black-and-white science fiction-horror film, produced and directed by Roger Corman staring Richard Garland, Pamela Duncan, and Russell Johnson.
Plot: The film concerns a second scientific expedition that is sent to a remote Pacific island to discover what happened to the scientists of the first. Unknown to them when they arrive, the island is inhabited by a pair of radiation-mutated giant crabs that not only consumed the members of the first expedition, but absorbed their minds, and now plan to reproduce their kind in numbers.....