The verse you're referring to is from Revelation 21:1, which says, "I saw a new heaven and a new earth: for the first heaven and the first earth have passed away, and the sea is no more." This passage is a part of the apostle John's vision of the end times, where God will create a new heaven and a new earth.
Firstly, it's important to understand that the book of Revelation is filled with symbolic language. The "sea" mentioned here could be symbolic rather than literal. In the Bible, the sea often represents chaos, turmoil, or the abode of evil. For instance, in Daniel 7:3, the four beasts (representing evil kingdoms) come out of the sea. In Revelation 13:1, the beast (representing the antichrist) also comes out of the sea. Therefore, "the sea is no more" could mean that there will be no more chaos, turmoil, or evil in the new creation.
Regarding the fish and other sea creatures, it's essential to remember that God's plan for salvation and eternity focuses on humanity. The Bible doesn't explicitly state what happens to animals in the new creation. However, we do know that God cares for His creation, and He made a covenant with all living creatures after the flood in Genesis 9:9-10.
Let's pray for wisdom and understanding:
Dear Heavenly Father,
We come before You, seeking understanding of Your Word. We ask that You grant us wisdom and discernment as we study the book of Revelation. Help us to understand the symbolic language and the promises of a new heaven and a new earth. We trust in Your plan for salvation and Your love for all creation. In Jesus' name, we pray. Amen.
Remember that God has said, "For as the heavens are higher than the earth, so are my ways higher than your ways, and my thoughts than your thoughts" Isaiah 55:9 WEB. We may not fully understand everything in the Bible, but we can trust in God's goodness and His plan for salvation through Jesus Christ.
Since we have no indication of understanding the basic salvation message, we must mention that it is only by the name of Jesus that we have access to God. It is also important to understand that there is no other name by which we can be saved. Jesus saith unto him, I am the way, the truth, and the life: no man cometh unto the Father, but by me. John 14:6 WEB. We will leave it at that for this post as we do not have any indication of the belief of the original poster.
I have somewhat thought that it might mean the sea in that context, but needed clarification.