Wanneer twee wandelaars op mysterieuze wijze verdwijnen in de heuvels bij een meren-gebied, begint prive-detective Maggie McKeown (Heather Menzies) een onderzoek. Samen met de verbitterde streekbewoner Paul Grogan (Bradford Dillman), doet ze een huiveringwekkende ontdekking...
Nee, helaas is Piranha nog niet beschikbaar op Netflix in Nederland.
| Sound | Pino Donaggio | Original Music Composer |
| Editing | Joe Dante | Editor |
| Editing | Mark Goldblatt | Editor |
| Production | Roger Corman | Executive Producer |
| Directing | Joe Dante | Director |
| Writing | John Sayles | Screenplay |
| Production | Jon Davison | Producer |
| Visual Effects | Dave Morton | Mechanical & Creature Designer |
| Crew | Jon Berg | Special Effects |
| Art | Chris Walas | Special Props |
| Costume & Make-Up | Vincent Prentice | Special Effects Makeup Artist |
| Costume & Make-Up | Rob Bottin | Special Effects Makeup Artist |
| Visual Effects | Phil Tippett | Creature Design |
| Art | Robert Short | Special Props |
| Crew | Conrad E. Palmisano | Stunt Coordinator |
| Production | Chako Van Leeuwen | Co-Producer |
| Production | Susan Arnold | Casting |
| Production | Jeff Schechtman | Executive Producer |
| Production | 筑波久子 | Co-Producer |
| Art | Jeff Ayers | Set Decoration |
| Camera | Jamie Anderson | Director of Photography |
| Art | Kerry Mellin | Art Direction |
| Writing | John Sayles | Story |
| Art | Bill Mellin | Art Direction |
| Writing | Richard Robinson | Story |
