Island Claws (1980) 
No creature is left untouched by the 'nature runs amok' sub-genre, so with Island Claws it was the turn of the humble crab to strike fear into the hearts of your average beach-goer.
However, these are no ordinary crabs... instead we have some half-baked scientific mumbo jumbo from 'crab experts' about warm water making crabs grow at an exceptionally fast rate coupled with some news reports about a dodgy nuclear power facility peppered throughout the first portion of the film, so with that in mind the bulk of the film can be pretty much discarded as viewers are aware of and just want to get to the giant crab action!
The giant crab (singular unfortunately) is a pretty impressive site when it does finally scuttle onto the screen (after some semi-ginat efforts crop up here and there) and certainly causes some mayhem, however it's all over a little too quickly and certainly doesn't reach the heights of some of the nature-sploitation fare out there in the carnage department. Still, the effects are pretty decent and at least manages to entertain in parts. It's certainly one of the best if not
the best giant mutated crab film I've seen thus far.
Originally posted here:
Nightmare USA Films Discussion Thread