Their wings appeared to be vestigial only, as the creatures were seemingly too large to use them for actual flight. The Halosian society seemed to be a class-oriented one. Each individual's main goal was to "evolve" up the class structure by increasing his or her number of hostile kills (though the opponent may be peaceful). They employed large battleships with weapons that fired energy pulses. Their code allowed mutiny if the captain, or lord, failed, at which point other members of the crew could take charge and evolve themselves. Their vomit was acidic, self-mobile, and highly destructive.