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) Predator (fictional species) The Predator (also known as Yautja or Hish-Qu-Ten) is a fictional extraterrestrial species featured in the "Predator" science-fiction franchise, characterized by its trophy hunting of other species for sport. First introduced in 1987 as the main antagonist of the film "Predator", the Predator creatures returned in the sequels "Predator 2" (1990), "Predators" (2010) and "The Predator" (2018) and the crossover films "Alien vs. Predator" (2004) and "" (2007). The Predator has been the subject of numerous novels, video games and comic books, both on their own and as part of the "Alien vs. Predator" crossover imprint. Although