Michael Madsen may get top billing in the film as its only big name actor, but he probably filmed all of his lines in only one day. His on-screen appearance in it can be counted in mere minutes.
(at about 42 minutes into the film) Rachel Hunter (Talia) is the only person in the film to actually call the creature a piranhaconda.
Filmed in Kaua'i, Hawai'i.
Piranhas are primarily found in Brazil, where the national language is Portuguese. The correct Portuguese pronunciation of the fish's name is "piranyah", not " pirannah".
(at 12 minutes and 54 seconds into the film) An online caption reads "Artist sketch from the witness's description". "Witness's" should be "witness' " without the apostrophe and the extra "s". Proper English punctuation requires that a noun ending in "s", when made possessive, does not take an apostrophe and an extra "s".