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Marine Oceanic Bathypelagic Layer (Water Column Layer)

Component: Layer

Unique Identifier: 624

Water Column Layer Marine Oceanic Bathypelagic Layer

Definition The region where light does not penetrate, rendering the water column totally dark except for bioluminescence, generally from 1,000 meters to 4,000 meters depth. Organisms at these depths are subjected to immense pressure; food webs depend on organic detritus rather than active photosynthetic production. Waters in this layer generally are composed of cold, bottom currents (from sinking water masses descending from polar latitudes).