A scuba diving instructor, her biochemist boyfriend, and her police chief ex-husband try to link a series of bizarre deaths to a mutant strain of piranha fish whose lair is a sunken freighter ship off a Caribbean island resort.
The special effects are awful (the piranhas are obviously hand puppets) and the script worse.
25
Miami Herald
Cary Darling
Sound and image are consistently bad, and Piranha II is the first film in my experience to give screen credit (in opening and closing titles) to a man in charge of "special effects and prosthetics." It can't be an easy way to make a living.
20
Empire
Kim Newman
It plays a lot like a Porky's holiday comedy for the first half, and then the seagoing killer fish learn to fly and big rubber toothy things terrorise the survivors.
This is a routine monster film, unrelated to Joe Dante’s 1978 Piranha. Idiotic premise has US government genetic engineering experiments creating a deadly form of grunions (hinted at being used in the Vietnam war).