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 that scapes to earth after stealing a weapon called "Predator Killer", and that is being hunted down by a far larger genetically enhanced predator. The enhanced Predator is mostly CGI, however 6’9” Canadian actor Kyle Strauts and also Brian Prince served as stand-in for the character on set. The Predator's blood was made from a combination of the liquid from glow sticks mixed with K-Y Jelly. The mixture loses its glow quickly, so new batches had to be quickly made between takes. The technique was used in all five films featuring the Predator. The camouflage effect was designed by