I was just thinking about aliens and different kinds there could be, like Flood-like or Predator-like or even ones like the Na'vi from the movie Avatar.   The idea of a nearly catastrophic parasitic alien filled my brain with al sorts of ideas of their life cycles, emergent behaviors, and viralness. A flood-like organism could decimate entire planets, eventually causing a organization to form that would quarntine that sector. Also a company could weaponize the parasite and conquer worl