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