- Country: Italy
- Genres: Horror, Sci-Fi
- Release: 2000-01-08
- Director: Alvaro Passeri
- Writers: Alvaro Passeri
- Language: Italian
- Stars: Clay Rogers , Carlo Bon , Sharon Marino , Laura di Palma , Ann Wolf , Deran Sarafian
- Runtime: 86 min
- Awards: N/A
- AKA: Piranha 4 , Fishrous (Indonesia) , Creatures from the Abyss (United States of America) , Creatures from the Abyss (Germany) , Πλάσματα της αβύσσου (Greece) , Планктон (Russian Federation) , Creatures from the Abyss (Malaysia) , Plasmata tis avyssou (Greece) , Sea Devils (Philippines) , 深海からの物体X (Japan) , Creature dagli abissi (Italy) , Object X (Japan) , Plankton
- Plot: Five teenagers embark on a boating trip off the coast of Florida. The teens get hopelessly lost at sea after they get caught in a fierce storm. Fortunately, the quintet stumble across an abandoned yacht in the middle of the ocean with a mysterious biology lab on board it. Unfortunately, there are also ferocious mutated prehistoric fish running amok on the yacht. Will any of the teens survive this harrowing ordeal?
- IMDB:tt0198913
Plankton Cast · · · ALL
Alvaro Passeri
Director
Clay Rogers
Mike
Michael Bon
Bobby
Laura di Palma
Dorothy
Ann Wolf
Julie
Deran Sarafian
Scientist