Ganymede is the seventh and largest moon of Jupiter, as well as the largest moon in the Solar System. It was terraformed in the twenty-first century by heating its original thick layer of ice to reveal a great seawater ocean underneath. With very little natural landforms, Ganymede is primarily used in the commercial fishing industry to harvest such animals as the Ganymede rock lobster and the endangered Ganymede Sea Rat. It has 8 million residents. 
The moon is considered on the outskirts of inhabited space and does not have access to many new technologies.
Gett escaped from the Space Warriors and became critically injured in a ship near Ganymede. Faye Valentine became stranded in the area when her ship, the Red Tail, ran out of gas. She tried to rescue him, but he died of his injuries. She was eventually saved by the Bebop, and the crew later saved the population from the Warriors' release of Monkey Business. 
Ganymede is modeled after Marseille, France and much of the language is French.