The Evil Below (1989)

The Evil Below is a 1989 horror film about an adventurer who goes hunting for treasure on a cursed shipwreck. Starring actors included Paul Siebert and June Chadwick. It is one of many underwater-themed movies released around 1989, including The Abyss, Leviathan, Deepstar Six, Lords of the Deep, and The Rift (Endless Descent).