**1.1 Definition**

Marine mammals are, in short, catalytic species. Thus, knowledge of areas that are important for them will facilitate the balancing of human uses of the ocean with the imperative of conserving marine biodiversity.

Marine mammals are highly consumed animals of marine creatures production at the different levels specially utmost trophic type from initial production as sea-cows or sirenians, are an order of fully aquatic, herbivorous mammals) to predatory fish and some other types of marine mammals, such as the polar bear, some whales, and dolphins.
