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) two of the captured humans, the last Predator manages to kill another member of his kind from a rival tribe, but is defeated in combat by the human survivors. The survivors then head off to seek a way back to their home, just in time to witness more people be dropped. In June 2014, Fox announced a sequel which Shane Black will direct and co-write with Fred Dekker, and John Davis will produce. Continuing the existence of two Predator species, the film opens with a 'standard' Predator landing on Earth and being captured by a government research division known as