'Sea monster' in the Bible

Am, I, a sea, or a sea-monster, - That thou shouldst set over me a watch?

Thou, didst crush the heads of the Sea-Monster, Thou didst give him to be food, for the people of the deserts;

There, ships, sail along, This sea-monster, thou hast formed to sport therein;

Nebuchadrezzar king of Babylon - Hath devoured me Hath vexed me, Hath set me down as an empty vessel, He hath swallowed me like a sea-monster, He hath filled his belly with my dainties, - He hath driven me away!

For, just as was Jonah in the belly of the sea-monster three days and three nights, so, will be the Son of Man, in the heart of the earth, three days and three nights.