“To the angel of the assembly in Smyrna write: “The first and the last, who was dead, and has come to life says these things: “I know your works, oppression, and your poverty (but you are rich), and the blasphemy of those who say they are Jews, and they are not, but are a synagogue of Satan. Don’t be afraid of the things which you are about to suffer. Behold, the devil is about to throw some of you into prison, that you may be tested; and you will have oppression for ten days. Be faithful to death, and I will give you the crown of life.
He who has an ear, let him hear what the Spirit says to the assemblies. He who overcomes won’t be harmed by the second death.
And when he had opened the second seal, I heard the second beast say, Come and see. And there went out another horse that was red: and power was given to him that sat thereon to take peace from the earth, and that they should kill one another: and there was given unto him a great sword.
And the second angel sounded, and as it were a great mountain burning with fire was cast into the sea: and the third part of the sea became blood; And the third part of the creatures which were in the sea, and had life, died; and the third part of the ships were destroyed.
Worship him who made the heaven, the earth, the sea…Revelation 14:7

And the second angel poured out his vial upon the sea; and it became as the blood of a dead man: and every living soul died in the sea.