Descending from the Night Hunter Clannear the southern pole of Yautja Prime, Stalkerlives in a world of complete darkness. Having developed unparalleled night vision technology, the members of Stalker's clan hunt in coordinated packs over large, open areas. Their translucent skin is an environmental adaptation that allows their phosphorescentgreen blood to shine through, and that glow acts as a location signal in the absence of light.
Pack hunting offers a great advantage, for while most creatures in this area are blind, their prey is also much larger than them and thus extremely dangerous to take down alone. Stalker and his clan are very removed from the rest of the planet and thus hunt more for survival than for sport. The Night Hunter Clan is one of the few Predator clans that does not possess cloaking technology, as it is of no use in this environment.