Zones of the ocean
5 depth zones have been identified in the ocean. Life is most abundant in the uppermost ‘euphotic’ layer, where photosynthesis occurs. The mesopelagic is practically dark, and many creatures hide here during the day. The bathypelagic zone begins at 1,000 metres, where the pressure is nearly 100 times greater than at the surface. Below that lies the abyssopelagic zone,down to the sea floor-except where ocean trenches cut through the sea bed, creating what is called a hadopelagic ...
Zones of the Open Ocean
Zones of the Open Ocean-- Oceanographers divide the ocean into three broad zones. Together, they could hide 20 Washington Monuments stacked on top of each other. Each zone has a different mix of species adapted to its light levels, pressures, and temperatures. About three-fourths of the ocean is deep, permanently dark, and cold