This is what I have been learning about, true seals and eared seals. They are both
mammals. Mammals can feed it pups with it own milk. They spend more time under
water because it is warmer for them to stay in. Eared seals have arm which uses them
for feet. True seals have short arm and hump or wriggle themselfs to move. Every
summer they grow new layer of skin.
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