'Sea' in the Bible

It would be better for him if {a millstone} is placed around his neck and he is thrown into the sea than that he causes one of these little ones to sin.

So the Lord said, "If you have faith like a mustard seed, you could say to this mulberry tree, 'Be uprooted and planted in the sea,' and it would obey you.

"And there will be signs in the sun and moon and stars, and on the earth distress of nations in perplexity from the noise of the sea and [its] surging,