瑤山鯉(學名:Aphyocypris arcus)為輻鰭魚綱鯉形目鯝科細鯽屬的魚類,是中國的特有物種。分佈於廣西瑤山等,本魚體延長且側扁,腹部圓,腹鰭後有腹棱,口小且端位,無觸鬚,眼大,側線完全,前半部向下彎曲,側線鱗36-39枚,尾鰭深分叉,下咽齒3行,背鰭及臀鰭軟條7枚,背部及體上半部暗灰色,下半部及腹部銀白色,沿側線有一條不明顯的黑色縱紋,體長可達8公分,主要棲息於山溪中底層水域,生活習性不明。[1]
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