There are five zones.
Epipelagic Zone - This is the top layer of the ocean. It is also known as the sunlight zone because this is where most of the visible light exists.
Mesopelagic Zone - The mesopelagic zone is sometimes called the twilight zone. Very little light gets into this zone.
Bathypelagic Zone - The next layer is called the bathypelagic zone.This is sometimes called the midnight zone or the dark zone. The only visible light that can be seen is produced by the creatures themselves. Most of the animals that live at these depths are black or red in color due to the lack of light.
Abyssopelagic Zone - The next layer is called the abyssopelagic zone, also known as the abyss. The name comes from a Greek word meaning "no bottom". The water temperature is near freezing, and there is no light at all. Very few creatures can be found at these depths.
Hadalpelagic Zone - Beyond the abyssopelagic zone is the hadalpelagic zone. It is the deepest parts of the ocean. These areas are mostly found in deep water trenches and canyons. The deepest point in the ocean is located in the Mariana Trench off the coast of Japan at 35,797 feet. The temperature of the water is just above freezing. Life can still be found here.
www.seasky.org