Revelation 8:8

8 The second angel sounded his trumpet, and something like a huge mountain, all ablaze, was thrown into the sea. A third of the sea turned into blood,

Read Revelation 8:8 Using Other Translations

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;
The second angel blew his trumpet, and something like a great mountain, burning with fire, was thrown into the sea, and a third of the sea became blood.
Then the second angel blew his trumpet, and a great mountain of fire was thrown into the sea. One-third of the water in the sea became blood,