Watching this odd little adventure movie, it's hard to believe that it was directed by the same man who brought us such high quality Giallo classics as The Strange Vice of Mrs Wardh and The Case of the Scorpion's Tail, but it has to be said that despite it's low quality production values, Island of the Fish Men is an entertaining ride and one that surely deserves more praise than it's getting. Like many Italian films from the seventies, this is one is a rip off of a successful American film, the one in question this time being the critically panned Island of Dr Moreau. Sergio Martino's film takes ideas such as mutation, greed and adventure and moulds it into one slightly compelling film, which makes up for what it's lacks in coherency and logic with a load of mostly intriguing ideas. The central plot follows a boat which crashes on a small island. It quickly becomes apparent that not everything about this place is normal, and it soon transpires that half of the population has been turned into "fish men" - a cross between a man and a fish, which exist for purely selfish reasons...
The truth about this movie is that it's a lot more fun if you ignore the trashy production values. The central monsters look completely ridiculous, and much of the movie takes place on sets that look like they cost someone a few pennies - but the movie is well shot in spite of this, with the underwater photography being a particular highlight and the pacing of the movie is well done in that the film never becomes boring. The way that the plot comes together isn't exactly genius, but it takes in a lot of ideas and I've seen films made on plots with much less thought put into them than this one. The biggest location standout in the film is definitely the lost city of Atlantis. To be honest, I'm not a massive fan of adventure movies, and therefore don't see this lost city get mentioned much - but it is always nice to see it in a movie. The central island location is good in that it provides an apt setting for the story and also provides the movie with the right amount of mystery, as Martino makes good use of the voodoo theme. Overall, this isn't exactly a classic and there are certainly a lot worse trashy adventure movies out there than this one.