mu·tu·al·ismAHD[myo͞o′cho͞o-ə-lĭz'əm] D.J.[ˈmjuːtʃuːəˌlɪzəm]K.K.[ˈmjutʃuəˌlɪzəm]n.（名词）mutualisma clownfish is protected by a sea anemone, which stings the fish's predators; in turn, the clownfish removes parasites from the sea anemone
An association between organisms of two different species in which each member benefits.互靠论：两种不同种类之间互利的联合
