The Fishmen and Their Queen (1995)

Amidst a ravaged world tainted by radioactive pollution, two teenagers desperately search for sustenance. Their journey leads them to Socrates, a mysterious man who guides them to a seemingly idyllic island, offering a stark contrast to their grim urban reality. However, the allure of this paradise hides a dark secret: it is governed by a stunning yet merciless queen, who commands a legion of grotesque fishmen as her subjects. As the teens navigate this treacherous new environment, they must confront the chilling truths that lie beneath the island's surface.