'Sea' in the Bible

Daniel {explained} and said, "I was looking in my vision in the night, and look, the four winds of heaven were stirring [up] the great sea.

And four great beasts [were] coming up from the sea, differing {from one another}.

And [then] he will pitch the tents of his palace between [the] sea [and] {the beautiful holy mountain}, and he will come to his end, and there is no one helping him."