The Roon Sea was the main body of water on the planet Roon. Explorer Mungo Baobab, along with his droids R2-D2 and C-3PO, traversed this sea in their search for the roonstones. After evading the maniacal Governor Koong's slave galley, the trio was sucked towards a whirlpool. It was here that, faced with the prospect of being sucked under if he kept his find, Baobab threw over a large cache of the valuable gems.