The Leviathan is a colossal sea serpent from ancient Near Eastern mythology and the Hebrew Bible, described as an unstoppable monster of the deep. In the Book of Job and Psalms it is depicted as a fire-breathing, many-headed beast that only God could subdue. Scholars trace its origins to older Canaanite myths of Lotan, a chaos-dragon battled by the storm god Baal. While symbolic in scripture, modern cryptid enthusiasts link Leviathan to reports of massive, unexplained sea creatures—blurring myth and cryptozoology.