Ocean zones are layers within the oceans that contain distinctive plant and animal life. They are sometimes referred to as ocean layers or environmental zones. The ocean environment is divided into two broad categories, known as realms: the benthic realm consisting of the seafloor and the pelagic realm consisting of the ocean waters. These two realms are then subdivided into separate zones according to the depth of the water. Sunlight obviously cannot penetrate beyond a certain depth in the ocean.
Measuring Light Penetration
Light Transmission in the Ocean
Light Zones T he ocean can be divided from its surface to its depth into three zones based on the amount of light received. They are: 1. Sunlit Zone: This is the top layer, nearest the surface. It is also called the euphotic zone. Here there is enough light penetrating the water to support photosynthesis. Because photosynthesis occurs here, more than 90 percent of all marine life lives in the sunlit zone.
Light fields and optics in coastal waters
This article describes the habitat of the Open oceans. It is one of the sub-categories within the section dealing with biodiversity of marine habitats and ecosystems. It gives an overview about the characteristics, zonation , biology and threats of the open oceans. Some legal aspects are also discussed.
The oceanic zone has a wide array of undersea terrain, including crevices that are often deeper than Mt. Everest is tall, as well as deep-sea volcanoes and ocean basins. While it is often difficult for life to sustain itself in this type of environment, some species do thrive in the oceanic zone. The oceanic zone is subdivided into the epipelagic , mesopelagic, and bathypelagic zones.