The Predators or Yautjas don’t exist alone in the Universe, aside from us humans, there are other alien species that have been seen alongside them and also hunted by them for sport and blooding ritual. Some aliens like the xenomorphs and river ghosts as well as predator hell hounds you have seen in the movies, but there are more of them. We have counted 10 alien species that exist in the Predator Extended Universe. Check them out.
Source
¿Los Mayas tuvieron contacto con extraterrestres? – Bien y de Buenas
