The Bozelians were an alien species native to Bozel Prime.
At the time the planet was visited by Q and Q Junior, in the subjective year 2378, it had a population of sixteen billion individuals. Though Q tried to get his son to apologize to all of them for re-arranging their tectonic plates, he became angry and shut his father out. Q then relented and said he could do what he liked as long as no Bozelians suffered as a result. (VOY: "Q2")
This planet was only mentioned in dialogue.