The Crystal Sea existed on the planet Auratera, found within the Outer Rim Territories, as an internal sea in its southern region. On the eastern coast of the Crystal Sea, within a sizable inlet, sat the city of Dewbright. To reach locations that needed to be returned to their original condition before the Sith Wars, the Ithorian inhabitants of the city used boats along with skimmers to navigate the Crystal Sea and the rivers connected to it.
The 2016 Nexus of Power sourcebook for Star Wars Roleplaying contained a reference to the Crystal Sea. Fantasy Flight Games released the book as part of the Star Wars: Force and Destiny roleplaying game.