Leviathan (Hebrew: לִוְיָתָן, "Twisted; coiled, cetacean, whale, sea monster, dragon, large aquatic animal, perhaps the extinct dinosaur, plesiosaurus") was a Biblical sea monster referred to in the Old Testament (Psalm 74:13-14 Job 41; Isaiah 27:1). The word leviathan has become synonymous with any large sea monster or creature. In the novel Moby-Dick it Job refers to great whales, and in Modern Hebrew, it means simply "whale".The king over the children of pride is a reference to Satan (the Accuser). Just as he is referred to in the New Testament as a red dragon in Rev.12 having seven heads, so in Psalm 74:14: "Thou didst crush the heads of the Leviathan,..."
The word Leviathan is also mentioned in Rashi's commentary on Genesis 1:21: "God created the great sea monsters - Taninim." Jastrow translates the word "Taninim" as a "sea monsters, crocodiles or large snakes". Rashi comments: "According to legend this refers to the Leviathan and its mate. God created a male and female Leviathan, then killed the female and salted it for the righteous, for if the Leviathans were to procreate the world could not stand before them."
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