A non-planetary life (NPL) form is any organism that lives in space for the majority of life, unaided by technology. The most common non-bacteria types resemble whales or large fish, however worm-like creatures are also quite frequent. Far less common are plant or barnacle-like organisms that have no means of propulsion and thus cannot move or spread seeds easily. Most non-planetary life forms have the ability to enter long periods of dormancy, as well perform photosynthesis and electrolysis. Due their atypical environments, NPL's have evolved features that place them between plant and animal. For example, many have complex brains and sensory organs, but also perform photosynthesis instead of consuming organic matter.
Space whales are the most studied and most diverse type of non-planetary life forms, apart from bacteria. 'Whale' is not a precise definition or taxonomic rank, but a catch-all term for auto-propulsive NPL's due to the fact that they often take a shape similar to a whale or fish. While not biologically immortal, most space whales live to be several thousand years old, with a maximum age being dependent on the individual and its environment. This is achieved in part by their slow metabolism and large size, but chiefly by their long periods of dormancy during interplanetary, or sometimes interstellar, migration. Space whales are believed to be able to reproduce asexually, although reproduction has never been witnessed, and therefore never been studied.
Boaz the Swift Wanderer was the name given to the first space whale ever discovered in 2420. Boaz had a probe attached to itself by RCCM, which monitored it over the next several decades. The probe was never removed. Boaz has a kind of organic combustion engine, is capable of electrolysis and photosynthesis, has eye-like organs, and can cool itself using an organic liquid cooling system. A series of logs from an unknown researcher can be found here.
Extra-planetary sneegs, also called exo-sneegs, are set apart from space whales by the fact that they are not auto-propulsive, resemble worms as opposed to whales, and are believed to be sneegs of varying species that managed to survive in space. Despite not being suited for vacuum, most sneeg species are hearty and durable, allowing them to live, for some length of time, in space.
The Great Sneeg is a mythical canyon carver (sneegus gigas) that lived below the crust of Old Terra and was the center of worship for some groups. It is believed by some to have survived the Wipe and been flung into space, becoming one of the first extra-planetary sneegs and certainly the largest. However, the chances of the Great Sneeg surviving are beyond astronomically slim, if it even existed in the first place.
Mold commonly growths on the outside of space stations and other spacecraft that are inhabited by living organisms.