3 The second angel poured out his bowl into the sea, and it became blood as of a dead man. Every living thing in the sea died.
poured his bowl into the sea – As mentioned “the sea” represents man’s salvation throughout the Book of Revelation. The baptisms of those who worship the image of the beast, and receive his mark, result in spiritual death.
every living thing in the sea died – why is there a difference from “a third” of the creatures in Chapter 8, and “every living thing” in Chapter 16? The focus of Chapter 8 is the effort of the Angels to remove the lawlessness from the kingdom of heaven, and the deliverance of God’s people from the plagues. But Chapter 16, purely describes the wrath on the kingdom of the beast. This is obvious in the first and fifth bowls of wrath.