Piranha II: The Spawning (1981)
FLYING PIRANHA! That is all.
Oh you want to know more? It was the directing debut of James Cameron, best known for THE TERMINATOR, ALIENS, TERMINATOR 2: JUDGEMENT DAY, TRUE LIES, TITANIC (1997), and AVATAR. He once joked it was "the finest flying killer fish movie ever made." Rumor has it he broke into the studio to cut his own version. He denies this.
A Caribbean island resort becomes the buffet table for flying mutant piranha. FLYING PIRANHA!! Lance Henriksen (ALIENS, THE TERMINATOR) plays a police chief trying to stop them.
Toyland Chairman commented
James Cameron did in fact work on the film, but as it turns out only for about a week. The majority of the film was directed by producer Ovidio G. Assonitis. James' name was left on due to his contract that an American sounding name be included to make the film more appealing to an American audience.
A guide to Horror movies that I read , had the line " The Director James Cameron must be a pseudonym. There no way that any one would leave their real name on a movie that bad."