After Stanley Potts's uncle Ernie's mad obsession with canning fish turns dangerous, Stan is force to make it out on his own. He finds new friends in a carnival full of eccentric characters and meets the legendary Pancho Pirelli, the man who swims in a tank full of perilous piranhas.
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.
This book describes the physical characteristics, habitats, family life, and history of piranhas and explains what is being done to save their population.