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Tanichthys albonubes

Tanichthys albonubes
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.These creatures are brilliant for children as very easy to look after. It is a member of the carp family (family Cyprinidae) of order Cypriniformes, native to China. The White Cloud Mountain Minnow is practically extinct in its native habitat. It was believed to be extinct for some years, 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.
The species was discovered at White Cloud Mountain in Guǎngdōng in the 1930s by a Boy Scout leader called Tan, a distant relative of Tan Meng Yoe —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. 
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 fin. Several varieties are known, one with bright light edges to the dorsal and anal fins and one with red edges to those fins.[3] In addition, there is a long-finned variety and a golden variety. Sexual dimorphism is slight. The male generally has brighter colors and a slimmer body.
White Cloud Mountain minnows are considered good fish for beginners, as they are extremely forgiving with regard to aquarium temperature and water quality. They are often sold as ideal "starter fish" for cycling a new aquarium, however it is kinder if they are introduced to an already cycled tank. They are schooling fish, and feel most comfortable in a group of at least five. An individual of these minnows kept alone may become timid and lose its bright color. White Clouds are generally peaceful and happy to coexist with other fish, as long as they are not put in a tank with larger fish that may eat them. The minnows are usually top or middle-level swimmers and rarely swim close to the bottom of a tank.
Although the nominal temperature range for the species in the wild is 18–26 °C, it can survive water temperatures down to 5°C. This makes it an ideal fish for keeping in an unheated aquarium in cold climates. In fact, White Clouds are more active and healthier when kept at temperatures lower than those at which most tropical tanks are kept. Water hardness (dH) should be from 5 to 19, and pH levels should range between 6.0 and 8.0. Also, the aquarium should have a top. White Clouds have been known to jump out on rare occasions.
During the 1940s and 1950s, White Cloud Mountain minnows acquired the nickname, the "Poor Man's Neon Tetra," because they were much more affordable in price than the colorful and then expensive Neon Tetras.
"Meteor Minnow" variety
Two variants are commonly available: the "Golden Cloud" and the longer-finned "Meteor Minnow." The Golden Cloud is a relatively new variety as compared to the Meteor Minnow. The Meteor Minnow first made its appearance in the 1950s in Perth, Western Australia and the Golden Cloud in the 1990s. Breeding between the two varieties has recently resulted in another attractive fish, the "Golden Meteor Minnow." Inbreeding of Golden Clouds have resulted in "Blonde" Clouds, light yellow specimens similar in colour to blonde guppies and "Pink Clouds", flesh colour specimens which lacks further pigmentation still.

白云山鱼的体形细小,长而侧扁,体高约等于头长,腹部圆吻钝而短,口上位。口裂向下倾斜,几乎与体铀垂直。上颌长于下颌,前端无突起。口无须,眼大,侧上位。背鳍短,起点显著在腹鳍起点之后,胸缩短,末端不达腹部起点,腹缩末端可达肛门,肛门紧靠臀鳍起点。臀鳍较长,约与背鳍相对。尾鳍叉形,末端尖,上下叶约等长。体被中等大小圆鳞,体侧鳞片上无侧线。体侧颜色鲜艳,体侧从鳃孔上角至尾柄基部有一条金黄色的条纹.条纹上下各有几条黑色线条。尾柄基部有一红色大圆斑,背鳍和尾鳍基部有许多红色小班点。背鳍和臀鳍呈黄绿色边缘透明 白云山鱼又名红尾鱼、白云金丝鱼、邓鱼、唐鱼、彩金线鱼。
  拉丁学名Tanichthys albonubes。英文名:White cloud mountain minnow 。濒危等级:绝迹(野生)。中国国家Ⅱ级保护野生动物。,观赏鱼界常称之为金丝鱼、莺鱼。属鲤形目,鲤科,(左边“鱼”,右边“月”)亚科,唐鱼属。唐鱼属的鱼类,该属也只有唐鱼这一种。它分布于广州市附近的小山溪中,为广东省特产鱼类。