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When two teen hikers disappear around Lost River Lake, private detective Maggie McKeown teams up with the local drunk to search for clues. Their investigation takes them to a secret military base where they inadvertently let loose an experimental strain of mutant piranha. Now the guests at every resort downriver are on the menu...

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Us release date: August 03, 1978

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Us poster from the movie Piranha

Main Cast

  • Paul Grogan
  • Maggie McKeown
  • Dr. Robert Hoak
  • Jack
  • Buck Gardner
  • Dr. Mengers
  • Betsy
  • Laura Dickinson
  • Colonel Waxman
  • Trooper
  • Mr. Dumont
  • Suzie Grogan
  • Whitney
  • Earl Lyon
  • Barbara Randolph


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