As the name suggests, deep regions of ocean, or the seafloor, where its at its most darkest, home to bioluminescent fish and titanic sea predators.
A much warmer, brightly coloured ocean, host to large mammals and fish, as well as much smaller tropical fish of an extreme variety of colours and shapes.
The busiest of the underwater biomes, 80% of the world's fish species life and mingle here in a large ecosystem, all of which seeming to follow strict schedules which help the reefs thrive.
Freezing cold waters, usually the area of ocean beneath ice bergs and large sheets of ice, creating huge underwater ice caverns and reefs of cold dwelling fish and sea foliage
The same as the Arson Grokdrul biome, but underwater, formed by deep sea volcanic vents and wide, underwater ravines bubbling with hot, volcanic rock and magma coming into contact with the water. Proceed with caution, dangerous, and sometimes even paralysing, gases form here. Brine pools can also be found around the borders of these biomes.