The nymphs of aquatic species (also called naiads), such as dragonflies, have gills and other modifications for an aquatic existence.
水生种类的若虫(也称为稚虫)，如蜻蜓，有鳃和其他生活于水中必需的诱发变异。
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Etymologically speaking, a fairy is something quite particular, related in kind to the naiads, or water nymphs, and while of the genus, we are sui generis.