Creatures from the Abyss (original title Plankton) is a 1994 Italian b-movie directed by Al Passeri and written by Richard Bauman. The film starred Clay Rogers, Michael Bon, Sharon Twomey, Laura di Palma, Ann Wolf, and movie director and actor Deran Sarafian.
A group of five teenagers, three girls, and two boys get lost in the ocean with a Dinghy, and a big storm begins. Suddenly they spot a yacht sitting in the middle of the ocean, and they go to investigate and to find shelter. But in fact, the yacht was a secret laboratory studying mutated fish results of radioactive plankton. One of the specimens escapes kills the whole crew, and preys on the unsuspecting teenagers.