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) shot multiple times and may have therefore not been operating at his full potential. A second possibility is that it was used to filter out impurities in the air - exhaust and such - which would not be found in more natural environments). Their dietary habits are also mentioned in "Predator 2", where it is revealed that the creature regularly visits a slaughterhouse every two days to feed on the stored meat there. Throughout their film appearances, Predators have undergone numerous design variations. In "Predator 2", the main Predator was designed to look more urban and hip than its predecessor.