Introducing of marine mammals in persian gulf

Marine mammals are a diverse group of 120 species of mammal that are mainly ocean-residence or depend on the ocean for food. They contain the cetaceans (whales, dolphins, and porpoises), the sirenians (manatees and dugong), the pinnipeds (true seals, eared seals and walrus), and several otters (the sea otter and marine otter).The polar bear, while not fully aquatic, is also usually considered a marine mammal because it lives on sea ice for most or all of the year. They spread all over the world, one of the most places for dwelling is persian gulf, very important area in Southwest Asia, isan expansion of the Indian Ocean located between Iran and the Various small islands (most of them were belong to iran) and the Arabian Peninsula.It is the world's largest single source of crude oil and related industries dominate the region, by the way this body of water is also has very rich biological ecosystem, There is the afects that these bilogical groups may have a many effect global vital circle on the world environment as well. So far, however, the impact on the world environment has not been connected too much One of most important groups are here are Marine mammals, 13 group of them are reported in persian gluf, but as a matter of fact 3 groups of them usually are observed.In this study, We just try to intuduce the groups.