简介：Dolphinsareveryinterestinganimals.Theylooklikefishbuttheyarenotfish.Fishhavecoldbloodbutdolphinshavewarmbloodlikeotheranimals.Fishcanliveunderwaterbutdolphinscannot.Theycanstayunderwaterforalongtimebutthentheyhavetocomeupbecausetheybreatheair.Fishlayeggsbutdolphinshavelivingbabies.Thesedrinktheirmother’smilklikeother
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