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 creating a fun and exciting atmosphere where people can learn about the animals they support. In 2017, the wildcard match was performed as a live-action movie to celebrate the 5th anniversary of the tournament. The wildcard match was also done with four mammal competitors instead of the usual two. Members of the March Mammal Madness team dressed up as the competing mammals and acted out the battle in front of a green screen. The battle was then edited together and the final video was tweeted out during the first day of the 2017 March Mammal Madness season. In 2018, brief