唐鱼（学名：Tanichthys albonubes），又称白云山鱼、白云金丝鱼、红翅鱼、红尾鱼、金丝灯、广东细鲫、潘氏细鲫，是辐鳍鱼纲鲤形目鲤科的一种。

唐鱼由中国鱼类学家林书颜于1932年在白云山发现，一度被认为已经于野外灭绝，至近年才重新于野外发现。目前分布在广东白云山的小河，花县，汕尾，惠州以及广州一带，亦有指深圳河有唐鱼的种群，唐鱼亦发现于越南北部广宁省下龙流域，在澳洲，哥伦比亚和马达加斯加曾发现水族养殖逃出的个体。2009年香港嘉道理农场与中国科学家于海南发现新的唐鱼野生族群。

现被列入中国国家二级保护动物和在《中国濒危动物红皮书》的濒危等级设为绝迹，并列入《国家水生野生动物保护名录》中，而唐鱼的香港种群已灭绝，粉岭的唐鱼发现地亦已建作公共屋邨。除此之外，相信深圳的种群亦已绝迹。

The White Cloud Mountain minnow (Tanichthys albonubes) is a hardy species of freshwater fish and coldwater fish often kept in aquaria. The species is a member of the carp family (family Cyprinidae) of the order Cypriniformes, native to China. The White Cloud Mountain minnow is practically extinct in its native habitat, due to pollution and tourism. It was believed to be extinct for over 20 years in 1980, but an apparently native population of this fish was discovered on Hainan Island, well away from the White Cloud Mountain. They are bred in farms and are easily available through the aquarium trade. However, inbreeding in farms has led to genetically weak stock that is vulnerable to disease and prone to physical deformities.