|  | Unlike fish, Dolphins are mammals and use lungs to breath instead of gills. Like other mammals they give birth as opposed to laying eggs but unlike other mammels they do not have hair on their bodies. |
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They don't have body hair because they need to swim as fast as they can to catch fish, their main source of food. They also need to be able to evade their predetors, like the evil sharks found in the ocean. Dolphins also eat squid. |
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