Forbidden World | 1982
While working on a project to avert a food crisis, a genetic research team creates a new lifeform that they name Subject 20. Unfortunately, Subject 20 mutates very quickly and eats ravenously, and soon has killed all of the laboratory animals. An investigator is called in to help solve the problem, but Subject 20 is unstoppable, and continues to devour most of the research team. But eventually, the creature's massive appetite turns out to be the source of its destrution.