蛰居美洲石鱥(学名:Lythrurus umbratilis)为辐鳍鱼纲鲤形目雅罗鱼科的其中一种,分布于北美洲美国、加拿大的五大湖及密西西比河流域,本鱼体细长且侧扁,大眼睛,身体呈浅橄榄色,鱼脊上有一条暗色条纹。繁殖期时雄鱼的侧面通常呈银色并带有微红色调,体长可达8.8公分,栖息在沙石底质、流动缓慢的溪流或水塘,繁殖期在6至8月,会筑巢产卵,属杂食性,以藻类及水生昆虫为食。
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