In a study published Tuesday, Japanese and American scientists described what they found in sediment samples taken from a flat, wide area 3.7 kilometers to 5.7 kilometers below the ocean’s surface, known as an abyssal plain.
Source: tatoeba (11154815)
The oceanic ecosystem includes the pelagic zone, the benthic zone, and the abyssal zone.
Source: tatoeba (11567747)
The falling of dead whales in the abyssal zone generate interesting microecosystems that last a relatively long time.
Source: tatoeba (12930332)
This "abyssal" life, typically in the form of strange tube-worms and microbes, is almost completely unknown to science.
Source: wiktionary
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