Elack was a male leviathan - a living ship like Moya. He was partnered with his unnamed female Pilot (John Crichton referred to her as "Your Ladyship", "Sweetheart" and "The Mother Teresa of the Uncharted Territories") for over 350 cycles prior to Crichton's arrival. Elack was very old for a Leviathan; he and his Pilot were traveling to the Leviathan "sacred space" to live out their remaining days when Crichton originally sought refuge on board.