No. The "sea" is a metaphor. God defined His metaphors in the scriptures, especially within the OT prophesies. The sea was a metaphor for the pagan nations, the gentiles which surrounded the "pleasant land" or the "earth" of Israel much as water surrounds an island.
"“‘I thought how I would set you among my sons, and give you a pleasant land, a heritage most beauteous of all nations. And I thought you would call me, My Father, and would not turn from following me." (Jer. 3:19, RSV)
"“and I scattered them with a whirlwind among all the nations which they had not known. Thus the land they left was desolate, so that no one went to and fro, and the pleasant land was made desolate.” (Zech. 7:14, RSV)
In prophetic judgment language each nation was "the earth" the prophet was sent to warn of coming judgment. Moses said, speaking to the OT congregation of Israel,
"Give ear, O ye heavens, and I will speak; and hear, O earth, the words of my mouth." (Deu. 32:1, KJV)
where the "heavens" were the political ruling authorities and the "earth" were the people of that land nation under that authority.
Speaking of the coming judgment against Judah and Jerusalem, Isaiah 1:1-2,
"The vision of Isaiah the son of Amoz, which he saw concerning Judah and Jerusalem in the days of Uzziah, Jotham, Ahaz, and Hezekiah, kings of Judah.
2 Hear, O heavens, and give ear, O earth: for the Lord hath spoken, I have nourished and brought up children, and they have rebelled against me." (KJV)
was again calling the ruling authorities "heavens" and the people of the land nation of Judah "O earth".
So, in prophesy, judgment language is associated with specific land nations, and must be kept in context with the particular land nation the prophet was sent to warn. Revelation was the warning of the destruction of Jerusalem, and the Mosaic temple, for all those that had pierced Christ (Rev. 1:7).
So, the "earth" of that prophesy was Judea and Jerusalem; the "heavens" of that prophesy were the ruling authorities over that land territory which foremost were the Sanhedrin in Jerusalem, the scribes and Pharisees; and subsequently their ruling authority whom they answered to - the Romans. As Judea was a conquered territory under Roman rule, attached to the empirical province of Syria since 63 BC, then the "earth" of Judea was surrounded by the pagan nations "sea" of Rome.
The sea beast was the Roman ruler, Caesar; and by extension Caesar's dominion or kingdom of Rome. The land beast was the Sanhedrin who plotted to kill Christ. In prophesy, wild beasts (wolves, lions, leopards, bears) were always the symbols and metaphors of tyrannical rulers who parasitically fed off the wealth of the people. (1) (2)
"7 Therefore, ye shepherds, hear the word of the Lord;
8 As I live, saith the Lord God, surely because my flock became a prey, and my flock became meat to every beast of the field, because there was no shepherd, neither did my shepherds search for my flock, but the shepherds fed themselves, and fed not my flock;
9 Therefore, O ye shepherds, hear the word of the Lord;
10 Thus saith the Lord God; Behold, I am against the shepherds; and I will require my flock at their hand, and cause them to cease from feeding the flock; neither shall the shepherds feed themselves any more; for I will deliver my flock from their mouth, that they may not be meat for them." (Ezek. 34:7-10, KJV)
The shepherds set over the flock - the Levitical priests - were supposed to care for the people of God, but instead began confiscating their wealth, and destroying the people. God compared them to wolves who kill and eat the sheep (Ezek. 22:7; Zeph. 3:3; Matt. 7:15)
Once the Mosaic temple was destroyed, the animal sacrifices ceased, then all nations were welcome to come to the heavenly Jerusalem of the everlasting, heavenly kingdom of God. Christ became that sacrificial lamb for all people of all nations to be able to have the opportunity to be reconciled to the Father. Thus, no more sea - as our Father no longer makes a distinction between land nations or land territories.
"26 For ye are all the children of God by faith in Christ Jesus. 27 For as many of you as have been baptized into Christ have put on Christ.
28 There is neither Jew nor Greek, there is neither bond nor free, there is neither male nor female: for ye are all one in Christ Jesus.
29 And if ye be Christ's, then are ye Abraham's seed, and heirs according to the promise." (Gal. 3:26-29, KJV)
As all those who are in Christ are counted for the seed of Abraham, it is no longer a blood line distinction, but a faith line that counts. And, as those who are counted for the seed of Abraham are God's definition of Israel (3), then all those in Christ are the Israel of God who are saved with an everlasting salvation (Isa. 45:17).
Therefore, all nations are welcome to the Feast of Tabernacles, the Feast of the nations, and there is no more distinction between land nations - so no more "sea". The first heaven and the first earth referred to the Mosaic covenant. The new heaven and the new earth refers to the new covenant under the gospel of Christ. (4)
Further reading: The Lake of Fire at ShreddingTheVeil
1) The Signs of Revelation - Part V: The Animal Symbols... at ShreddingTheVeil
2) The Beast of Revelation - ShreddingTheVeil
3) God's Definitions - Part I: The House of Israel ShreddingTheVeil
4) The Signs of Revelation - Part VIII: The New Heavens and The New Earth ShreddingTheVeil