Do you enjoy movies that are terrible in every possible way? Then may I recommend Lords of the Deep, the last of the trilogy of aquatic horror movies released in 1989 that aren’t The Abyss. This one distinguishes itself by having the worst of everything. The best that can be said is it’s in color and a talkie.
Meanwhile, I amuse myself by pretending all three of these movies are in the same universe. The Leviathan was sunk by missiles from DeepStar Six whose cave collapse released the Lords of the Deep. 😄