Night Of The Crabs - Guy N. Smith
I bought a book in this series as a kid because the cover art was so awesome. I never got around to reading it, so while in a nostalgic mood recently I bought it cheap on kindle.

I realise that this book has gained cult statis by pulp horror fiction connoisseurs (oxymoron?) but I mustn't be one of them because I thought it was plain awful... in every way imaginable.

The ONLY redeeming thing about 'Night of the Crabs' is the cover art. After 36 years it still rocks.