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Metynnis hypsauchen


Metynnis hypsauchen
Silver Dollar
皇冠银板
Silver dollar is a common name given to a number of species of Metynnis, a tropical fish belonging to the Characidae family which is closely related to piranha and pacu. Originating in the Tapajós River basin in South America, this somewhat round-shaped silver fish with slight red-tinged anal fin is popular with fish-keeping hobbyists. It will grow to a maximum length of 14 centimeters (5.5 inches).
The silver dollar is a peaceful schooling species that spends most of its time in the mid- to upper-level of the water. Its maximum lifespan is more than 10 years. A chin-layer, the adult fish will spawn around 2,000 eggs. This breeding occurs in soft, warm water in low light.
Silver dollars natively live in a tropical climate in the sides of weedy rivers. They prefer water with a pH of 5–7, a water hardness of up to 15 dGH, and an ideal temperature range of 24–28 °C (75–82 °F). Their diet is almost exclusively vegetarian and in captivity they will often eat all the plants in a tank. They will also eat worms and small insects.
The silver dollar is listed as semi-aggressive but it is very mellow like the pacu. These fish can be kept in community tanks with fish that can't fit in their mouths, so don't put a full-grown silver dollar with small neon tetras and guppies. These fish can also be kept with larger fish like oscars, pikes, and larger catfish when full grown.
高身银板是最早被称为银板的种类,是银板鱼属(Metynnis)中最普遍的品种。主要分布在亚马逊盆地中的圭亚那与巴拉圭北方的小溪河流中,在巴西与哥伦比亚亦有本种的发现。高身银板属于中表层草食淡水鱼,成熟个体体长可达14cm。体侧呈现扁平状,鱼体长度和宽度几乎相等,体型类似一个倾斜的平行四边形,头部虽小但眼睛大,位于背部最高点的背鳍上可见到少数黑点,银白色的腹部轮廓去读平滑,在边缘还覆盖着不甚清晰的直条纹。高身银板性情温和,具有显著群游性,喜欢躲藏鱼水草丰盛的水域,喜好啃食水草。在人工饲养条件下,可作为杂食性鱼种饲养。
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