Marine biology or biological oceanography Marine biology is a science that studies the state of living organisms in oceans or other marine bodies. Where most marine organisms live in the sea and others on land, species are classified on the basis of the environment rather than on taxonomy. Marine biology is different from the marine environment where marine biology is concerned with how organisms interact with the environment. They help to determine the nature of our planet as well as contribute significantly to the oxygen cycle, and are involved in the regulation of Earth's climate. The beach is part of marine life, and also includes a part of marine biological life that includes a lot of microscopes, including most phytoplankton and zooplankton. The establishment of marine protected areas has shown long-term results and has often contributed to a rapid increase in the abundance, diversity and productivity of marine organisms. At the same time, the benefits of protection are evident for living organisms that spend most of their time in the marine environment, where they can provide protection to migratory species if they are protected in their vulnerable stages, in particular the protection and incubation of their breeding sites. The marine environment is known as the vast water area, which is characterized by a significant increase in the proportion of solids dissolved in fresh water, including plant and animal organisms and non-living components. A huge number of diverse organisms include their shapes, colors, lifestyles and species, and this vast number of diverse organisms share a range of characteristics known as life manifestations. Some argue that water is only one of the basic requirements of human life. Most sectors are concerned with the purity of water and the possible shortage of water resources. But we believe that the seas and oceans are no less important than drinking water, as they are an important aspect of normal life in general. Marine organisms contribute to the maintenance of environmental balance and ensure the purity of the sea and the quality of its waters. Ocean waters are a major source of food and mineral salts, and are an important means of trade, transport and leisure activities. Humans are increasingly becoming dependent on seas and oceans for staple food through direct fishing or fish farming for animal feed. About 10% of the protein consumed by humans comes from the oceans. These facts underscore the imperative to take serious and rapid steps to protect the environment and marine organisms from pollution hazards. Many organisms live in the sea like some other species of animals that live in the sea, such as starfish and jellyfish are also called fish, but they are not fish and do not contain bones, as well as another type of aquatic organisms known as shellfish molluscs such as shellfish, and there are crustaceans such as Shrimp and shrimp. Interest in marine organisms has increased in order to increase their nutritional or medicinal use and also to prevent their publication. Marine organisms have great diversity and are not easy to inventory or even classified because they have many characteristics and lifestyles are diverse as well as different functions of its members and ways of mating and reproduction. Some marine organisms extract oxygen by the gills and some of these animals breathe by the lung and ascend to the surface to regenerate the air, there are fish prefer to live close to the surface or medium depths and there are fish prefer bottom.