Marine mammal Marine mammal Marine mammals are aquatic mammals that rely on the ocean and other marine ecosystems for their existence. They include animals such as seals, whales, manatees, sea otters and polar bears. They do not represent a distinct taxon or systematic grouping, but rather have a polyphyletic relation due to convergent evolution, as in they do not have an immediate common ancestor. They are also unified by their reliance on the marine environment for feeding. Marine mammal adaptation to an aquatic lifestyle varies considerably between species. Both cetaceans and sirenians are fully aquatic and therefore are obligate water dwellers. Seals
March Mammal Madness by a mix of scientific research, and an element of chance. Katie Hinde and the March Mammal Madness organizing team do in-depth research on the mammal contestants. Temperament, diet, social behavior, environment, size, and fight style are just a few of the factors that are taken into consideration. After these factors are weighed against each other, Hinde and the rest determine probability of one animal defeating another. This is how they develop the seed, or rank, of each mammal. Then a 100 sided die is rolled with a determined percentage numbers attributed to each animal. This adds an element of