Moya is a character/spacecraft and a member of the Leviathan race. She had her first appearance in the "Premiere", and was last seen in "The Peacekeeper Wars Part 2".

Like others of her race, Moya was captured by a Peacekeeper squad at a young age and was bonded with a Pilot, who serves as the Leviathan's navigator, operator, companion, and link to the crew of the ship. Leviathans are ships of peace, and as such have no offensive capabilities. They do have an impressive defensive maneuver, however, called starburst, which allows the ship to travel at incredible speed through a tear in space-time.

Moya was once a captive of the Peacekeepers who control her and other Leviathans through the use of giant control collars placed around the ships that prevent autonomous control and inflict pain upon any disobedience. Moya and Pilot, with the help of Crichton, Zhaan, Rygel and D'Argo, manage to escape. Moya has become a friend and home to her crew and they have been through many bizarre, disheartening, and exhilarating events together.

Moya is maintained by DRDs (Diagnostic Repair Drones), which are small, beetle-like robots that Leviathans build as they grow. They help with Moya's upkeep, by repairing and maintaining Moya. DRDs also play a major role in many of the adventures, helping John and the crew. At the end of season one, Moya gives birth to a Peacekeeper/Leviathan hybrid gunship that Aeryn Sun names Talyn, after her father.