The Xanthan homeworld was an inhabited planet located inside the Delphic Expanse. It was home to a gigantic floating trading bazaar where shopkeepers such as B'Rat Ud and Zjod made their homes. One of the planet's native animals was the Xanthan marmot. The Xanthan homeworld was half a light year from Oran'taku, a distance which could be traversed in about two days (with a warp 5 engine).
In September of 2153, Enterprise NX-01 visited the Xanthan homeworld to do business with B'Rat. While there, Jonathan Archer helped one of Zjod's slaves, Rajiin, to escape. Rajiin had actually been planted in Zjod's shop by the Xindi a few days earlier. (ENT: "Rajiin")