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 Mighty Minis, Critically Endangered, Mythical Mammals, and Sexy Beasts Animals who did not advance to round two: jerboa, bumblebee bat, tent-making bat, pygmy mouse lemur, least weasel, pygmy possum, quokka, social tuco-tuco, dormouse, Kanko, Pegasus, Pooka, Ichneumon, Water Horse, Greek Sphinx, Kishi, Colo Colo, yellow-bellied marmot, bighorn sheep, olive baboon, vervet monkey, bongo, koala, Irish elk, European hare, silver pika, black dorcopsis, cloud rat, Siau Island tarsier, Javan slow loris, riverine rabbit, saola, Sibree's dwarf lemur. Divisions: Cold-Adapted Mammals, Mighty Giants, Mammal Mascots, and Mammals of the Nouns. For the mascot mammal bracket, the university and the mammal the mascot