Lords of the Deep is a 1989 American science-fiction horror film co-produced by Roger Corman, about an underwater colony being attacked by alien life forms. Actors included Bradford Dillman and Priscilla Barnes.

Plot

Set on board an undersea laboratory in a near-future ocean where the Earth's ozone layer has been depleted and new means of habitation and survival are being explored, biologist Claire is working on an unknown specimen when she experiences psychic visions. Meanwhile, a routine crew replacement is inbound in a minisubmarine when an undersea quake occurs. Contact is lost with the sub and a search sub is sent out to investigate the silence, while one of the lab's crew works on exterior repairs in a diving suit. The search sub discovers the relief sub is now derelict and the hatch blown with no sign of the crew and is promptly attacked by large, stingray-like creatures. After repelling one creature with an electrical discharge, the second sub is overpowered by more of the rays and contact is lost again.