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Community reviews
From TMDb members · 6 total- Gimly4/10
Not a terrible film, but there was a remake in the 90s with the exact same story featuring better acting and better effects, so you can probably skip straight ahead to that one. Now I know that if I had been around when that remake came out, I'd probably be the first in line to c…
- Wuchak8/10
Adventuresome and fun "Jaws" homage with far superior women RELEASED IN 1978 and directed by Joe Dante, “Piranha” chronicles events when genetically-enhanced piranha are accidently released into a river system in central Texas, which threaten kids & counselors at a Summer Cam…
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Piranha
“A hideous death lurked unseen in the river...”
60%
Movie
1h 34m
AI Analysis
Piranha (1978) — AI movie analysis
WatchMind AI generated this AI analysis of Piranha (1978) — a movie tagged as Horror, Science Fiction, and Comedy with dark and funny moods and fast-paced pacing.
Story & themes: When flesh-eating piranhas are accidentally released into a summer resort's rivers, the guests become their next meal. Our models also surface themes such as identity, conflict, and relationships from synopsis and genre signals.
Watch context: Best suited for date night, solo focused viewing, and casual background watching. Expect fast-paced storytelling (~94 min).
Community signal: TMDb members rate Piranha 60% (738 votes) — solid community ratings for this movie.
AI verdict
Piranha suits viewers who want a dark and funny film — check the trailer and reviews before committing a full evening.
Algorithmic AI analysis from genres, synopsis, pacing heuristics, and TMDb community scores — not a generative chatbot. How WatchMind works.
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Audience & engagement
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TMDb audience score
60%
from 738 TMDb votes
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Synopsis
When flesh-eating piranhas are accidentally released into a summer resort's rivers, the guests become their next meal.
Quick facts
- Type
- Movie
- Status
- Released
- Release date
- 1978-08-03
- Runtime
- 1h 34m
- TMDB rating
- 6.0
- TMDB ID
- 24831
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- Read TMDb member reviews in the reviews section, and audience tips from other WatchMind visitors in Audience notes.
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Frequently asked questions
Where can I watch Piranha (1978)?
Piranha is available for discovery on WatchMind. You can find official links to rent, buy, or stream from licensed digital stores like Apple TV and Amazon in our "Where to Watch" section.
Is there an official trailer for Piranha?
Yes, you can watch the official trailer for Piranha directly on this page. We pull the latest video metadata from TMDb and play it via YouTube integration.
What is Piranha about?
When flesh-eating piranhas are accidentally released into a summer resort's rivers, the guests become their next meal.
Is there an AI analysis for Piranha?
Yes. WatchMind publishes an AI analysis on this page — tone, pacing, audience fit, and community scores from TMDb metadata and recommendation models (not a chatbot). Scroll to the AI Analysis section or read the meta description summary.
How long is the movie Piranha?
The official runtime for Piranha is approximately 94 minutes.
Cast & crew
Names and photos from The Movie Database (TMDb). Follow links on themoviedb.org for full filmographies.
Directors & writers
Cast

Bradford Dillman
Paul Grogan

Heather Menzies
Maggie McKeown

Kevin McCarthy
Dr. Robert Hoak

Keenan Wynn
Jack

Dick Miller
Buck Gardner

Barbara Steele
Dr. Mengers

Belinda Balaski
Betsy

Melody Thomas Scott
Laura Dickinson

Bruce Gordon
Colonel Waxman

Barry Brown
Trooper

Paul Bartel
Mr. Dumont
- S
Shannon Collins
Suzie Grogan
- S
Shawn Nelson
Whitney

Richard Deacon
Earl Lyon
- J
Janie Squire
Barbara Randolph
- R
Roger Richman
David
- B
Bill Smillie
Jailer

Guich Koock
TV Pitchman
Audience notes
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Community reviews
Written by TMDb members — same catalogue as our movie & TV metadata. API terms
Not a terrible film, but there was a remake in the 90s with the exact same story featuring better acting and better effects, so you can probably skip straight ahead to that one. Now I know that if I had been around when that remake came out, I'd probably be the first in line to complain "Why'd you even bother? It's just the first movie over again!", but seeing as I watched them both in retrospect, I can ignore the fact that I'm being a total hypocrite and move right ahead to recommending you just watch the remake. _Final rating:★★ - Had some things that appeal to me, but a poor finished product._
Adventuresome and fun "Jaws" homage with far superior women RELEASED IN 1978 and directed by Joe Dante, “Piranha” chronicles events when genetically-enhanced piranha are accidently released into a river system in central Texas, which threaten kids & counselors at a Summer Camp and vacationers at a lake resort. A spirited skip tracer (Heather Menzies) and a backwoods drunkard (Bradford Dillman) team-up to save the swimmers. Kevin McCarthy and Barbara Steele play military scientists who experimented with the escaped piranha. While "Piranha" is sort of a "Jaws" (1975) knockoff, it’s different enough to not be a rip-off: The story takes place in a river system deep in the mainland and not the ocean; the ‘monster’ consists of teams of little vicious fish rather than a huge Great White Shark; the beach sequences involve quaint campground-like beaches rather than major ocean beaches; unlike “Jaws,” there’s a focus on alluring young women, although “Jaws 2” (1978) delivered the goods in this area as well; there’s more of a sense of adventure and even suspense; and the tone mixes-in amusing elements with the horrific mayhem. As inferred, the picture is highlighted by several quality females with curvy Belinda Balaski (from "The Howling") and cutie Melody Thomas Scott (from The Young and the Restless) featured in prominent roles. Moreover, voluptuous Janie Squire has some worthy screen time in the prologue. There are superb women in the periphery as well. Interestingly, the 2010 quasi-remake, “Piranha 3D,” took the sleaze route with loads of nudity, but the women are ironically hotter here, not to mention the film’s all-around more entertaining. THE MOVIE IS LEAN and filler-free at 93 minutes and was shot along a river near San Marcos in the heart of Texas, Northeast of San Antonio. WRITERS: John Sayles and Richard Robinson. GRADE: A-
Decent watch, probably won't watch again, but can recommend for fans of Jaws or any other version of this movie. There is a 1995 remake of this movie that I would probably watch instead if I wanted to watch this gain. Not-trigger warning: There is a surprising LACK of gore in this movie. This has a decent story to it, but it shares aspects with Jaws, Friday the 13th, other movies of the era. Particularly the "hide the effect" routine that Jaws made famous. The practical effects aren't very good, which is why the best use of them was to hide the fish whenever possible. In a way, it really works if the threat is massive, unstoppable, and nearly invisible. The whole "secret government project" angle is a little irritating as this crossed my movie watching with my "otherworldy research": things like this are presented in movies as an absurd idea when they are reality. Maybe not to this extent, but as the government used to claim Area 51 didn't exist, that should prove my point. They cast was fine, I didn't see any problems, and I didn't see anything extra-ordinary from them. This isn't a bad movie, there are just so many better things to watch, including the re-make, I guess.
**Piranha is bad 70s creature feature gold! It's so bad it's great and a fun ride as long as you expect a total cheesefest.** Piranha is cheesy 70s/80s creature films at their very best! It has everything - evil military generals, obligatory lake celebrations, scientific experimentation gone wrong, horrible dialogue, low-budget effects, and more. It's clear as you watch the film that Piranha was heavily influenced by Jaws, with the city ignoring the warnings of the dangerous underwater creature, the very similar movie poster, and much more. Steven Spielberg has even named it his favorite Jaws rip-off movie. This low-budget gem was a zeitgeist of creature horror cinema of the decade that didn't allow bad effects, poor acting, or no money to stop them from making their movies. The remakes in the 2000's just used this movie as an excuse to show a lot of nudity, and while there is a little nudity in Piranha (1978), it is much briefer than its predecessors. Pirahna (1978) focuses on letting the army of hungry fish gnaw on its helpless victims. This goofy little creature flick launched the career of director Joe Dante, who later collaborated with Steven Spielberg himself to make Gremlins - a real creature masterpiece! Piranha is no Gremlins, but it sure is a fun start to Dante's creepy creature-filled career.
"People eat fish, fish don't eat people"! Well, that might be the theory but when a meddlesome couple accidentally release a swimming pool's worth of genetically modified fish into a river, we discover that that mantra isn't strictly true! It's only because "Dr. Hoak" (Kevin McCarthy) is at the facility that our interfering pair - "Maggie" (Heather Menzies-Ulrich) and "Paul" (Bradford Dillman) learn of the potential disaster scenario looming - especially when they realise that there is a water park down the river populated with loads of noisy, bitesized, tourists just perfect for their peckish predators. Can they get down the river in time to stop carnage ensuing? On that front - well, there's not a hint of jeopardy but along the way Joe Dante does manage to create a slight sense of menace. The photography and slightly "Psycho"-esque score at times do make this occasionally a little uncomfortable to watch. That said - the acting is pretty woeful, as is the rather pedestrian dialogue and the special effects are not going to keep Ray Harryhausen awake at night. It might work quite well in a cinema, though, at Halloween after a couple of bottles of Wild Turkey. It's a fun, throw-away, adventure that swipes a little at the military meddling in the affairs of science and is actually quite entertaining. Aim low and you won't be disappointed.
'Piranha' is short on laughs for a "comedy horror", though I did still enjoy this film. The elements to do with the titular fish are pretty strong, they are portrayed in the right way so the humans do feel in suitable danger. The piranhas aren't shown much, which is smart. Obviously it is inspired by 1975's 'Jaws' and does fall fairly far adrift of that classic, though that is to be expected and I'd still log it as a respectable attempt at following the mould set by that Steven Spielberg movie. It's nicely paced too, the ending felt like it came quickly. Bradford Dillman and Heather Menzies make for a pairing that I liked following, the rest of the cast are all on the same level - noteworthy to see Keenan Wynn and Dick Miller involved. It's not really a film about the cast though, let's be honest. Come for the piranha, stay for the piranha.
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