From seasky.org Scientists have divided the ocean into five main layers. These layers, known as "zones", extend from the surface to the most extreme depths where light can no longer penetrate. These deep zones are where some of the most bizarre and fascinating creatures in the sea can be found. As we dive deeper into these largely unexplored places, the temperature drops and the pressure increases at an astounding rate. The following diagram lists each of these zones in order of depth. Window.google_render_ad();
Diagram of the five layers of the ocean. Image copyright Sea and Sky
- the epipelagic, or sunlit, zone: The top layer of the ocean where enough sunlight penetrates for plants to carry on photosynthesis.
- the mesopelagic, or twilight, zone: A dim zone where some light penetrates, but not enough for plants to grow.
- the bathypelagic, or midnight, zone: The deep ocean layer where no light penetrates.
- the abyssal zone: The pitch-black bottom layer of the ocean; the water here is almost freezing and its pressure is immense.
- the hadal zone: The waters found in the ocean's deepest trenches.