All members of the weasel family (Mustelidae), and especially those in the otter subfamily (Lutrinae). There are about 17 different species of otters (subfamily Lutrinae) in about seven genera, but the sea otter is the only member of genus Enhydra (species Enhydra lutris). See the following: http://en.wikipedia.org/wiki/Sea_otter http://en.wikipedia.org/wiki/Lutrinae http://en.wikipedia.org/wiki/Mustelidae
sea lions and harp seals are related to seals
Very, very tenuously. Seals and spiny anteaters (echidnas) are both mammals. They are not, however, even the same type of mammals. Seals are placental mammals and echidnas are monotremes (egg-laying mammals).
Platypuses are only related to seals and otters in that they are all semi-aquatic mammals. Even there, the similarity is flimsy, because seals and otters are placental mammals, whereas platypuses are monotremes, or egg-laying mammals, one of only two types of such animals in the world.
Yes, Arctic seals are mammals. All seals are mammals.
Seals are mammals
Fur seals are mammals
All seals are mammals
Yes, all seals are mammals.
Both are mammals. That's it, they are not related. The walrus is a pinniped, related to seals, whales are Cetaceans, related to porpoises and dolphins.
Vaginal delivery, like other mammals.
All seals, including baby harp seals, are mammals.
Some are. Seals and other pinnipeds, for example.
NO seals are MAMMALS and all mammals are warm blooded