Originally, the Mantis Screamers were born with a stinger of considerable size on their tails, but, at an uncertain point in history, Glave parasites—natives of a “dead” planet in the Dinares sector—infested a rather large clutch of Screamer eggs. The Glaves consumed the embryos’ stingers and took their place, modifying the Screamer’s tail accordingly. After being assimilated by the Swarm, the Glave was slightly altered, and it now spawns and launches destructive, semi-sentient Wurms with great force.
The rigors of deep space travel are a natural part of the Mutalisk’s life. The skin of their annelid-like bodies takes on a gelatinous consistency and seeps through the dermal layer. This process compacts their organs and circulatory system to prevent damage from external pressure.
These leathery appendages afford the Mutalisk an astonishing degree of speed and maneuverability during atmospheric flight. Wing motion also generates energy that serves as a catalyst for the creature’s internal biological functions. They never stop flapping their wings, even when flying in a vacuum. We have determined that this is purely instinctual and unrelated to locomotion.
Mutalisks communicate in part through scent
, by means of different musks derived from its biological processes. The gaseous by-product of these processes is stored in special sacs located throughout the creature’s body, where it can be reserved for spaceflight propulsion.
To survive in deep space, the Mutalisk became self-sufficient. Every cell in its body is host to myriad bacteria that either produce chemicals or assimilate them in order to generate compounds for sustenance. New Mutalisk strains present certain genetic alterations to their cellular flora, resulting in more efficient bio-processes—to the point of tissue regenerating capabilities.