我的建议：到www.answers.com输入“dolphin”你要的资料都有了.很全的.

　　dolphin,large,swiftgamefish,Coryphaenahipparus,alsocalleddorado.Itisofnearlyworldwidedistributioninwarmwaters.Itslong,slenderbodyisblue,andinthelivinganimalthereareluminousshadesofgold,green,andpurple.Thedolphinhasadorsalfinthatrunsthelengthofthebodyandaforkedtail.Males,largerthanfemales,mayreachalengthofnearly6ft(1.8m)andaweightofover65lb(30kg).Dolphinstravelaloneoringroups,attainingspeedsof35mi(56km)perhr.Theyfeedonavarietyoffishes,especiallyflyingfish,whichtheysometimespursuebyleapingoutofthewater.TheyarevaluedasfoodinPolynesia,wheretheyareknownasmahimahi.Thetermdolphinisalsoappliedtoagroupofaquaticmammals(seedolphin,mammal).ThefishknownasdolphinsareclassifiedinthephylumChordata,subphylumVertebrata,classOsteichthyes,orderPerciformes,familyCoryphaenidae.