大部分雌性河豚多为灰色，而雄性多为粉丝。 马丁和达·席尔瓦认为那是瘢痕组织。
The females are mostly gray; the males' pink color, Martin and da Silva believe, is scar tissue.
马丁和其巴西同事维拉·达·席尔瓦(vera da Silva)发现雌性河豚尤其是误入雨林深处的河豚，也许是为了躲避具有攻击性，亮粉色的雄性河豚。
Martin and his Brazilian colleague Vera da Silva have found that female dolphins in particular stray far into the forest-perhaps to take refuge from aggressive, bright pink males.
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