Piranha 3D is a 2010 American 3D horror comedy film that serves as a remake of the comedy horror film Piranha (1978) and an entry in the Piranha film series. Directed by Alexandre Aja and written by Pete Goldfinger and Josh Stolberg, the film stars Elisabeth Shue, Adam Scott, Jerry O'Connell, Ving Rhames, Jessica Szohr, Steven R. McQueen, Christopher Lloyd and Richard Dreyfuss. During spring break on Lake Victoria, a popular waterside resort, an underground tremor releases hundreds of prehistoric, carnivorous piranhas into the lake. Local cop Julie Forester (Elisabeth Shue) must join forces with a band of unlikely strangers—though they are badly outnumbered—to destroy the ravenous creatures before everyone becomes fish food.

The film was theatrically released in the United States on August 20, 2010, by Dimension Films. It received generally positive reviews from critics and was a box office success, grossing over $83.1 million worldwide against a $24 million budget. A sequel, Piranha 3DD, released in 2012, was a critical and commercial failure.