A secret military project accidentally unleashes genetically engineered, flesh-eating piranhas into a river system, leading them to a popular summer resort and camp, forcing investigator Maggie McKeown and guide Paul Grogan to race against time to stop the ravenous fish before they slaughter the vacationers. Created by a rogue scientist for the Vietnam War, these piranhas are smarter and tougher than normal, requiring extreme measures to contain them as they head for their next meal at Lost River Lake.

Special Features:
- 2022 Restoration of the 4K Scan of the Original Camera Negative
- Presented in Dolby Vision
- Audio Commentary with Executive Producer Roger Corman
- Audio Commentary with Director Joe Dante and Producer Jon Davison
- 2022 Interview with Director Joe Dante
- Audio Commentary with Roger Corman
- Audio Commentary with Joe Dante and Jon Davison
- The Making Of Piranha: Interviews with Roger Corman, Joe Dante and Actors Dick Miller, and Belinda Balaski
- Behind-the-Scenes Footage
- Bloopers and Outtakes
- Still Galleries
- Behind-the-Scenes Photo Gallery Featuring Photos from Creature Designer/Animator - Phil Tippett's Archives
- Additional Scenes from the TV Version
- Theatrical Trailers
- TV Spot
- Radio Spots