Alpha Onias III
Class:	M
Location:	Alpha Onias system, Beta Quadrant

Alpha Onias III was the third planet of the Alpha Onias system. This Class M planet was located near the Romulan Neutral Zone in the Beta Quadrant. The surface of this planet contained high, but non-toxic levels of volcanic gases, including sulfur dioxide, methane, and hydrogen sulfide.

Barash, a humanoid child, was hidden in a cavern by his mother after their homeworld was attacked in the mid-24th century. The cavern was equipped with neural scanners that were able to transform matter into any form imagined, so that Barash could live in safety. (TNG: "Future Imperfect")