I was just suggesting for the asteroid amoeba behavior, but hey.
Arthropods: thick carapace adapted for microgravity and vacuum, joints extremely thin to remain flexible
PreCambrian Nightmare: legs everywhere, like seraphic angels who had so many wings they would cover their mind-breakingly beauteous forms, legs upon legs hide the fang-filled pustule that is its body
Breeds in Ships: like the amoeboids, Chwidencha use active reactors to incubate their young but will settle for a longer incubation by simply lodging an egg into larger powerlines and relying on the current
Explosive Breeding: their oviposition is nothing short of biological warfare, the central body explodes and proppells one or more self-guided eggs at the victim's ship, if more than one makes it to the host vessel, a few of the eggs will hatch early and live short horriffic lifespans hunting down the crew and tearing apart foodstuffs in the holds in preparation for their laterborn sibling(s) and, if bested, explode into a caustic soup and spread toxic vapors to a large portion of the interior
Hibernation: their natural growth cycle is a very long process that stymies the worst effects of their cancerous bodyplan and relies on cometary cycles to bring them close enough to a star to grow over several years and feed on the native microorganisms; naturally born Chwidencha aren't as terrifyingly deformed as their ship-borne brethren, but they're no less vicious when a ship does pass by and pique their instincts
Gravity Sensitive: being capable of growing to human size or greater, Chwidencha are actually horribly sensitive to even lunar gravities and tend to suffer injuries from merely moving faster than a crawl in earth-like conditions, although any atmosphere thick enough to support the average spacefarer is like jet fuel for the Chwidencha giving them the capacity for brutal strength and speed at the cost of tearing themselves apart.