'Sea monsters' in the Bible

And God created the great sea-monsters, and every living creature that moveth, wherewith the waters swarmed, after their kind, and every winged bird after its kind: and God saw that it was good.

Thou didst divide the sea by thy strength: Thou brakest the heads of the sea-monsters in the waters.

Praise Jehovah from the earth, ye sea-monsters, and all deeps;