Leviathan Fish are a breed of shellfish that can be found roaming the surface of the Jade Sea. Like their cousins the Jade Fish, these (usually) large sized sea creatures have adapted to the transformation of the sea into jade and have adapted to life on land. Leviathan Fish are encountered in both Leviathan Fish patrols and mixed Jade and Leviathan Fish patrols in the deeper parts of the Jade Sea, after the Gyala Hatchery mission, Leviathan Fish are hostile to Outcasts. It is unknown however if the naming is simply for the resemblance or if these creatures are parts of the larger sea monster.