David Ziegler (Treat Williams) is an American beach bum living on the Mexican shore with his buddy and business partner Paco (Antonio Fargas). Unfortunately, a lot of melodrama is about to be dumped in Davids' lap because his brother James (Carlo Mucari) got mixed up with a shady businessman, Rosentski (John Steiner), and figured to get rich by secretly recording the phone calls that Rosentski had made to the President of the U.S.! James mails David a CD he's made of these incriminating phone calls. The bad guys recruit Davids' ex-wife Liz (Janet Agren) to try to persuade David to hand over the CD, holding her debts over her head as a means of motivating her. David must ultimately battle the goons that Rosentski sends after him, and *also* do battle with a local one-eyed great white shark (named "Cyclops" by the natives) which has become a kind of personal nemesis for him.
Mediocre, fairly dull time waster could possibly have been more entertaining on a "so bad it's good" level, but very crude direction (by Tonino Ricci) and even cruder editing (by Gianfranco Amicucci) prevent the movie from being more fun. That isn't to say that there aren't some very amusing moments here and there, and things do pick up a little during the whole fight / pursuit sequence in the jungle. The music score by Stelvio Cipriani is fun even if it's not one of his best. The use of locations, at the least, is adequate. Williams doesn't look too happy to be here, but Fargas is rather engaging, Swedish beauty Agren offers some appreciable eye candy, and Steiner, the ubiquitous Brit character actor of so many Italian exploitation items, is a passable villain. And as one can see the story is pretty damn silly.
By the way, unless the word "shark" is used for its multiple meanings, the viewer should be aware that there's actually only one killer fish in this thing.
Five out of 10.