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) to the Perry description. It is very tall, has feminine hips, mammary glands, and a very muscular build, with different armor than the males. In Randy Stradley's miniseries "Aliens vs. Predator: War", it is revealed through the narration of the character Machiko Noguchi that Predators were responsible for the spread of Aliens throughout the galaxy, though the Predators themselves deny this, stating that their large interplanetary distribution is due to simultaneous convergent evolution. The comic series "Predator" and "Aliens vs Predator: Three World War" introduce a clan of Predators referred to as "Killers," who are enemies of mainstream Predators (here