Leviathan

Leviathan is a name originally assigned to a biblical sea monster, the oceanic counterpart of the land-based Behemoth. It can refer to the following species.
 * Leviathan (Endless Legends)
 * Leviathan (Farscape)
 * Leviathan (Gears of War)
 * Leviathan (Grand Tour)
 * Leviathan (Mass Effect)
 * Leviathan (Metroid)
 * Leviathan (Orion's Arm)
 * Leviathan (Supernatural)