Trivia

Ninety-five percent of the film's box-office reciepts came from overseas. It was particularly popular in Malaysia.

Everyone got to keep a piranha fish egg when filming was over.

Most of the actors and actresses were given S.C.U.B.A. training. This was particularly useful for Danielle Panabaker, who was not a very confident swimmer.

Danielle Panabaker had to surmount her fear of the water while acting in this film.

Puppets were used as much as possible for the piranha.