Orrg - race, origins from drakes.
They lost their appearance and exists like lifeform using ANY biomass to spawn their kind creatures. Orrgs have unusual organic starships grown from hundreds orrgs sacrificed as biomass.
Major ships has large brain to command swarms of self-guiding warheads, R1-reactor producing enough count of energy to reach near-light speeds but it needs a lot of biomass to accelerate...
Starships obey to The Brain - massive neural structure which able to telepathically control orrgs and usually situated on huge capital ship or "shipyard" - giant formation incubating ship embrions.