The principal aquatic feature of the planet Roon was known as the Roon Sea, a large water mass. The Explorer Mungo Baobab, accompanied by his droids R2-D2 and C-3PO, navigated this body of water while seeking the roonstones. The group avoided the insane Governor Koong's slave ship, only to be pulled into a swirling vortex. At this point, to avoid being dragged under, Baobab jettisoned a significant amount of the precious stones.