Leviathan (1989)

Synopsis:
Underwater deep-sea miners encounter a Soviet wreck and bring back a dangerous cargo to their base on the ocean floor with horrifying results. In a story owing a lot to _Alien_ and _The Thing_, the crew of the mining base must fight to survive against a genetic mutation that hunts them down one by one. Part of a wave of underwater movies including  The Abyss and Deep Star Six.
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