Drowned Crimson
From Pixelmon Wiki
Drowned Crimson is a Biome added by Pixelmon that generates in the Drowned World.
The Drowned Crimson biome that is part of the Ocean Forge Biome Category. It is filled with water from bedrock to the build limit. The water and sky of the Drowned Crimson is a very deep blood-red color and hundreds of dripping lava particles constantly surround the player, suspended in the water.