Pelagic Zone - Organisation of the Marine Ecosystem
The waters contained in the sea basin, constitute the pelagic zone which is divided into
The upper illuminated zone of the open ocean is also called epipelagic zone. So the euphotic pelagic ocean is named a epipelagic one. The aphotic pelagic province .has been divided into the following three horizontal zones: mesopelagic, bathypelagic and the abyssopelagic zone. There is no light in the bathypelagic and abyssopelagic zones. The mesopelagic zone is comparatively less dark but light is not sufficient to carry out photosynthesis.