The Abyss is a very rare and very dark biome. It can only be found in about 1/10 dark ocean biomes, when going far enough down, sometimes the water will get so dark, you can't see anything. This is the Abyss Biome
Fauna and Flora Edit
Nearly void of life, these ocean floors are home to the occasional sea creature. Mainly the Siphonophore, or Sea Cucumber....... But, it seems like something else, much bigger may be lurking down here too....