Leviathan (1989) starring Peter Weller, Ernie Hudson, Hector Elizondo, Richard Crenna
In Leviathan, A group of deep-sea miners discover a sunken Russian submarine. It contains a genetics lab, which apparently had created a monster. It slips onto their own ship and they must try to destroy it as it picks them off, one by one. Often described as “Alien in the ocean,” it captures much of the suspense of the space thriller.