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White Cloud Mountain minnow
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,〔(【引用サイトリンク】title=White Cloud Mountain Minnow )〕 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.〔(【引用サイトリンク】title=New population of endangered White clouds discovered )〕 However, inbreeding in farms has led to genetically weak stock that is vulnerable to disease and prone to physical deformities.〔(【引用サイトリンク】title=Tanichthys albonubes White Cloud Mountain Minnow )〕
The species was discovered at White Cloud Mountain (白雲山; Pinyin Bái Yún Shān) in Guǎngdōng in the 1930s by a Boy Scout leader called Tan, —hence the generic name ''Tanichthys'' ("Tan's fish"). The specific name ''albonubes'' is from the Latin ''alba nubes'' (white cloud).
The fish are sold in the aquarium trade under a variety of names, including White Cloud, White Cloud Mountain fish, White Cloud minnow, etc. The names Canton or China danio (although it is not technically a danio) and cardinal fish are also encountered. In Chinese the fish is known as 唐魚 (táng yu), 廣東細鯽 (Guǎngdōng xìjì), or 潘氏細鯽 (pānshì xìjì). ''Aphyocypris pooni'' is an obsolete synonym for this species; it was coined to designate a color variety which is now known to be the same species as the White Cloud Mountain minnow.
==Description==
This species grows to approximately 4 cm (roughly 1.5 in) in overall length, and is silver-green in color with a bright red caudal and dorsal fin. Several varieties have been developed through the fish's domestication, one with bright light edges to the dorsal and anal fins and one with red edges to those fins. The species can also be found in a golden cultivar and a rosy pink variety that displays red on all of the fins, and all color morphs can have long finnage. Sexual dimorphism is slight but noticeable. The male generally has brighter colors and a slimmer body, and his dorsal and anal fins are wide and fan-shaped, whereas those of the female are triangular and wedge-shaped.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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