亚利桑那骨尾鱼(学名:Gila ditaenia)为辐鳍鱼纲鲤形目雅罗鱼科骨尾鱼属的其中一种,被IUCN列为易危保育类动物,分布于北美洲美国亚利桑纳州Sycamore谷及墨西哥索诺拉州Rio de la Concepcion流域,本鱼体延长且侧扁,尾柄长,尾鳍大且分叉,嘴近端位,眼小,侧线鳞73-90枚,背部隆起,体上半部橄榄绿、下部银白色,背鳍鳍条9枚,臀鳍鳍条10枚,体长可达25公分,栖息在沙石底质的小溪及水塘,以昆虫及藻类为食,因栖地破坏及外来物种入侵导致族群减少。[2]
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