Ermac: If it has them, then we ca n assume that the dreadlocks on Predators are not actually hair, but something else. I always had the impression they were more like sensory tendrils, in any case. Aliens have dorsal tubes from human beings but not from canines (for whatever reason). That could be the same. And what's all this about nobody wanting the mouth wide? It's in a threatening posture! Predators always splay their jaws wide when they're like that. The first film had it do so very shortly after removing the helm and the second one had it doing so virtually all the time.