'Dragon' in the Bible

Awake, awake, put on strength and might, O arm of the Lord;Awake as in the ancient days, as in the generations of long ago.Was it not You who cut Rahab (Egypt) in pieces,Who pierced the dragon [of Egypt]?

“I will put hooks in your jawsAnd [I will] make the fish of your rivers stick to your scales.And I will pull you up from the midst of your rivers,And all the fish of your rivers will stick to your scales.

“Son of man, take up a dirge (funeral poem to be sung) over Pharaoh king of Egypt and say to him,‘You have compared yourself to a young lion among the nations,But you are like a monster in the seas;You burst into your riversAnd disturbed and muddied the waters with your feetAnd fouled their rivers [the source of their prosperity].’”