Leviathan

This monster can be found in the Old Testament. Although the term is used to describe any massive sea monster, there are some sketchy definitions of it out there, including:

“His snorting throws out flashes of light; his eyes are like the rays of dawn.”

“Smoke pours from his nostrils as from a boiling pot over a fire of reeds.”

“Nothing on earth is his equal—a creature without fear.”

Those quotes come courtesy of the Tanakh.