USA HISTORY

Detailed explanation-1: -Marine mammals are classified into four different taxonomic groups: cetaceans (whales, dolphins, and porpoises), pinnipeds (seals, sea lions, and walruses), sirenians (manatees and dugongs), and marine fissipeds (polar bears and sea otters).

Detailed explanation-2: -Pinnipeds (pronounced /ˈpɪnɪˌpɛdz/), commonly known as seals, are a widely distributed and diverse clade of carnivorous, fin-footed, semiaquatic, mostly marine mammals.

Detailed explanation-3: -seal, any of 32 species of web-footed aquatic mammals that live chiefly in cold seas and whose body shape, round at the middle and tapered at the ends, is adapted to swift and graceful swimming.

Detailed explanation-4: -Seals are mammals! They possess all the things that make an animal a mammal. They are warm-blooded, they are vertebrates, they have fur, and most of all, the mothers feed their babies with milk expressed through mammary glands.