Overview
Island of the Fishmen is a 1979 Italian action-horror film directed by Sergio Martino, starring Barbara Bach, Joseph Cotten and Richard Johnson.
In 1981, about 30 minutes of footage was removed from the original film and replaced with new material for international release. This version was given the title Screamers.
Plot
It is the year 1891 and a military doctor, Lieutenant Claude de Ross (Claudio Cassinelli) a survivor of not one, but two shipwrecks, washes ashore on a mysterious, uncharted Caribbean island along with a handful of convicts. When several of these convicts meet unfortunate ends at the hands of the titular fishmen, Claude and the other survivors flee into the jungle, only to encounter the sadistic Edmond Rackham (Richard Johnson) and his beautiful captive Amanda Marvin (Barbara Bach).
From Wikipedia (CC BY-SA 4.0).