When flesh-eating piranhas are accidently released into a summer resort's rivers, the guests become their next meal.
Bradford Dillman
as Paul Grogan
Heather Menzies
as Maggie McKeown
Kevin McCarthy
as Dr. Robert Hoak
Keenan Wynn
as Jack
Dick Miller
as Buck Gardner
Barbara Steele
as Dr. Mengers
Belinda Balaski
as Betsy
Melody Thomas Scott
as Laura Dickinson
Bruce Gordon
as Colonel Waxman
Barry Brown
as Trooper
Paul Bartel
as Mr. Dumont
Shannon Collins
as Suzie Grogan
