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 | 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 |
| Crew | Roger Creed | Stunts |
| Crew | Nick Palmisano | Stunts |
| Crew | Bobby Sargent | Stunts |
| Production | Tom Jacobson | Production Manager |
| Production | Harry Wowchuk | Location Manager |
| Crew | Jools Tippett | Special Effects Assistant |
| Crew | Jerome Seven | Special Effects Assistant |
| Visual Effects | Doug Barnett | Mechanical & Creature Designer |
| Visual Effects | Adam Beckett | Animation |
| Production | Susan Arnold | Casting Director |
| Camera | Ben Haller | Key Grip |
| Sound | Joel Goldsmith | Location Sound Mixer |
| Lighting | Michael Katz | Gaffer |
| Directing | Charles H. Eglee | Assistant Director |
| Directing | Greg Gears | Assistant Director |
| Camera | Dana Christiaansen | Assistant Camera |
| Camera | Andrew G. La Marca | Assistant Camera |
| Sound | Tony Santa Croce | Boom Operator |
| Art | Kevin Hughes | Props |
| Art | Kathleen Hughes | Props |
| Camera | Chris Brightman | Grip |
| Camera | Bill Decker | Grip |
| Art | Tim Doughten | Assistant Art Director |
| Editing | Brenda Balanda | Assistant Editor |
| Editing | Stacy Russo | Assistant Editor |
| Directing | Jeanne Rosenberg | Script Supervisor |
| Production | Sharron Reynolds | Production Secretary |
| Production | Ashley Stieglitz | Production Secretary |
| Costume & Make-Up | Jack Buehler | Wardrobe Assistant |
| Camera | O. C. Perkins | Still Photographer |
| Camera | Ted Boehler | Still Photographer |
| Production | Ed Tarbutton | Production Assistant |
| Production | Jeff Hoffman | Production Assistant |
| Production | Michael Martin | Production Assistant |
| Production | Jim Boni | Production Assistant |
| Production | Robet Brown | Production Assistant |
| Directing | Dick Lowry | Second Unit Director |
| Production | Tom Hammel | Production Manager |
| Camera | M. Todd Henry | Second Unit Director of Photography |
| Camera | Christopher Tufty | Assistant Camera |
| Camera | Clyde E. Bryan | Assistant Camera |
| Camera | Scott Buttfield | Grip |
| Camera | Moshe Levin | Grip |
| Sound | Richard Anderson | Sound Effects |
| Sound | Dave Yewdall | Sound Effects |
| Sound | Teresa Eckton | Sound Effects |
| Sound | Kendrick Sweet | Dialogue Editor |
| Sound | Valcie Yewdall | Foley |
