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) a definitive name for the species is not given in the films, the names Predators, Yautja, Hish-qu-Ten have been alternatively used in the expanded universe, suggesting that two unique "Predator-species" exist. Created by brothers Jim and John Thomas, the Predators are depicted as large, sapient and sentient humanoid creatures who possess advanced technology, such as active camouflage, directed-energy weapons, and interstellar travel. Both the Yautja and the Hish-Qu-Ten compete for a chance to enter the ritual of becoming "Blooded," a rank given to predators that have killed prey that has been deemed worthy. The Predator design is credited to special