寬吻海豚屬會以吱吱聲、吹哨聲及身體語言來溝通。身體語言的例子包括跳出水面、咬顎、拍尾及頭撞。[30]聲音及動作可以在群落中記錄其他成員的位置,也可以通報危險及食物。由於沒有聲帶,牠們是利用近噴氣孔的6個氣囊來發聲。每一隻寬吻海豚屬都有獨特的發聲聲頻。[31]雖然約翰‧立利(John C. Lilly)於1950年代提倡沒有海豚語言,但現已分辨了其他30種聲音。也有學者展示了兩隻寬吻海豚屬的人工語言詞彙。[32]
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