Determining Marine biology, the science of animals and plants in the water. It is also concerned with airborne and terrestrial species, which rely on food and other requirements directly from the bodies of salt water. It tries in the widest way to portray all the important phenomena of the many living creatures dwelling in the enormous oceans of the planet. The physical character of oceans and the biological creatures that live in them are intimately connected to marine biology in oceanography. The study of those organities that give their skeletal remains to the floors of the oceans or that make the enormous coral reefs of the tropical seas helps to comprehend the Marine Geology. One main objective of marine biology is to find out how ocean events affect organisms dispersal. Marine biologists are studying how certain species are adapted to different chemical and physical characteristics of seawater, to the motions and currents of the ocean, to the availability of light in different depths and to the solid surfaces of the sea bottom. The dynamics of marine ecosystems, in particular understanding of food chains and predation-prey interactions, should be identified with particular care. Marine biological information is of considerable value to fisheries on the distribution of fish and crustacean populations. The marine biology is also concerned with the impacts on sea-fish and plant life of some kinds of pollution, such pesticide and fertiliser runoff effects from land sources, accidental oil tanker spills and coastal construction sediments.