Tiny tripedal tribesmen that you can make worship you?! Giant space serpents that metabolize varying wavelengths of electromagnetic radiation, drawn to power blocks (and suns) because of said metabolization?! Insectoid creatures that devour the metal found in hull blocks, thus congregating around abandoned stations and wrecked ships?! Hive-minded NPC fleets with one central ship containing a leader, like the buggers from Ender\'s Game? Scarabs on desert planet that create a shield similair to that of ships when feeling threatened? SENTIENT LIQUIDS?!?! Arachnids that, while laying eggs, emit a pulsator-like blast? Space whales? Rogue AIs taking control of NPC ships to use for their own (nefarious or not) purposes/porpoises? AHHHH THE POSSIBILITIES ARE ENDLESS my mind is bursting.