Diagram of the five layers of the ocean. Image copyright Sea and Sky

Layers of the Ocean

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 diagram lists each of these zones in order of depth.