what class of vertebrates do seals belong to
Pinniped Pinnipeds,[a] commonly known as seals,[b] are a widely distributed and diverse clade of carnivorous, fin-footed, semiaquatic marine mammals. They comprise the extant families Odobenidae (whose only living member is the walrus), Otariidae (the eared seals: sea lions and fur seals), and Phocidae (the earless seals, or true seals). There are 33 extant species of pinnipeds, and more than 50 extinct species have been described from fossils. While seals were historically thought to have descended from two ancestral lines, molecular evidence supports them as a monophyletic lineage (descended from one ancestral line). Pinnipeds belong to the order Carnivora and their closest living relatives are bears and musteloids (weasels, raccoons, skunks, and red pandas), having diverged about 50 million years ago.
United States Navy SEALs The Navy needed to determine its role within the special operations arena. In March 1961, Admiral Arleigh Burke, the Chief of Naval Operations, recommended the establishment of guerrilla and counter-guerrilla units. These units would be able to operate from sea, air or land. This was the beginning of the Navy SEALs. All SEALs came from the Navy's Underwater Demolition Teams, who had already gained extensive experience in commando warfare in Korea; however, the Underwater Demolition Teams were still necessary to the Navy's amphibious force.[28][29]