Leviathan

Leviathan

Leviathan (pronounced /lɨˈvaɪ.əθən/; Hebrew: לִוְיָתָן, Modern Livyatan Tiberian Liwyāṯān ; “twisted, coiled”), is a sea monster referred to in the Bible. In Demonology, Leviathan is one of the seven princes of Hell and its gatekeeper (see Hellmouth). The word has become synonymous with any large sea monster or creature. In classical literature (such as the novel Moby-Dick) it refers to great whales, and in Modern Hebrew, it means simply “whale.”

via: http://en.wikipedia.org/wiki/Leviathan