The Belzoidian flea was a type of arthropod not native to Earth.
In 2366, when Q was stripped of his omnipotence and immortality as part of his punishment by the Q Continuum for his irresponsibility, he considered taking the form of a Belzoidian flea, before ultimately deciding on a Human appearance. (TNG: "Deja Q")
External link
- Belzoidian flea at Memory Beta, the wiki for licensed Star Trek works