
Level: English for Junior and Senior High School
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Dolphin
Dolphins are sea mammals. They have to breathe air or they will die. They are members of the Delphinidae family.
Dolphins have smooth skin. Only baby dolphins are born with a few bristly hairs on their snouts. Their hairs soon fall out. They have big tails and fin on the top of their backs to keep the dolphin from rolling over. The female dolphins have a thick...