The Pycan space moth was an insect capable of living in the vacuum of space.
Prior to 2154, Doctor Phlox heard of a Pycan space moth that drifted half a light year through space to return to its homeworld. (ENT: "Doctor's Orders")
StarTrek.com conjectured that the Pycan space moth was from a planet named Pyca, and/or from a star system that had a star named Pyca. [1]