Keystone species mussel population explodes uncontrollably, driving out most other species. These creatures need not be apex predators. Sea stars are prey for sharks, rays, and sea anemones. Sea otters are prey for orca. The jaguar, whose numbers in Central and South America have been classified as near threatened, acts as a keystone predator by its widely varied diet, helping to balance the mammalian jungle ecosystem with its consumption of 87 different species of prey. The lion is another keystone species. Keystone mutualists are organisms that participate in mutually beneficial interaction and the loss of which would have a profound impact upon
Predator (fictional species) and most of his OWLF team are outsmarted and slaughtered by their quarry. Towards the end of the movie, the Predator is ultimately confronted by Harrigan in his own ship and killed when Harrigan uses one of his own weapons against him. The Predator's clan-mates de-cloak and carry away the dead Predator's body and give Harrigan a flintlock dating from 1715 as a sign of respect. The film also makes a reference to the "Alien" films, as shown in the Predators' trophy room, which has a skull closely resembling that of an Alien. In 2004, a Predator ship arrives in