Basically this is an excuse to watch a bunch of shapely Eurobabes in bikinis frolic on an island. There is one little spider monster that gets killed off pretty quick and Alex D'Arcy running around as a half-man/half-spider monster but all he does is slowly stick his claw hand out to grab some of the girls with no real menace whatsoever. Maybe he's supposed to be one of those tragic sympathetic monsters. Anyway, the English dubbing is entertainingly bad and the jazzy score gives the film the right aura of burlesque.
Review of Horrors of Spider Island
