There's not an iota of originality in this catchpenny-titled creature feature. When they're called upon to investigate some unexplained deaths in a bayou backwater, medical examiner Tory Kittles and marine biologist China Chow face the somewhat unusual danger of being eaten by a genetically altered snakehead fish. Spawn director Mark AZ Dippé throws all the usual clichés into an entertaining pool of action, humour and gore, that's also better written than you'd expect. The mutant mayhem is kept moving at a snappy pace and there are plenty of water level camera angles for those cheap Jaws-style shocks that still manage to work their menacing magic. This is more fun that it has any right to be considering how ridiculous, old fashioned and formulaic it is.

When the body of a man is found completely destroyed in the swamps in Louisiana, the medical investigator Sam Rivers is assigned to investigate the murder. He travels with the biologist Mary Callahan to the location where the victim lived in a floating house and he meets his family and friends. They find that Chinese snake-heads genetically engineered that belong to a wealthy hunter are attacking and killing the locals. While the group fights to survive, the hunter Jeff arrives with his team to hunt the predators.