Corydoras aeneus surf/corydoras fish/Aquarium/咖啡鼠玩衝浪

Corydoras aeneus surf/corydoras fish/Aquarium/咖啡鼠玩衝浪


Corydoras aeneus surf/corydoras fish/Aquarium/咖啡鼠玩衝浪
Corydoras | Corydoras aeneus | Aquarium | 咖啡鼠魚
咖啡鼠玩衝浪
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Corydoras is a genus of freshwater catfish in the family Callichthyidae and subfamily Corydoradinae. The species usually have more restricted areas of endemism than other callichthyids, but the area of distribution of the entire genus almost equals the area of distribution of the family, except for Panama where Corydoras is not present. Corydoras species are distributed in South America where found east of the Andes to the Atlantic coast, from Trinidad to the Río de la Plata drainage in northern Argentina. Species assigned to Corydoras display a broad diversity of body shapes and coloration. Corydoras are small fish, ranging from 2.5 to 12 cm (1.0 to 4.7 in) in SL., and are protected from predators by their body armor and by their sharp, typically venomous spines.

The name Corydoras is derived from the Greek kory (helmet) and doras (skin). Corydoras is by far the largest genus of Neotropical fishes with more than 160 species.[5] It is the sole genus in the tribe Corydoradini. C. difluviatilis is recognized as the basalmost species of Corydoradini, exhibiting several plesiomorphic features compared to the other species of Corydoras. The type species for this genus is Corydoras geoffroy. Several hundred species are not yet classified, but kept by aquarists. These species are given 'C-numbers', originally devised by Hans-Georg Evers for the German fishkeeping magazine DATZ in 1993. In 2006, 153 C-numbers had been assigned, of which 32 had been assigned appropriate scientific names.

The species C. barbatus, C. macropterus and C. prionotos have been reclassified into the genus Scleromystax. Brochis had been differentiated from Corydoras due to the higher number of dorsal fin rays; however, Brochis has recently been suggested to be a synonym of Corydoras. This is contested and has not been universally accepted. The sixray corydoras belongs in Aspidoras.

Corydoras are generally found in smaller-sized streams, along the margins of larger rivers, in marshes, and in ponds. They are native to slow-moving and almost still (but seldom stagnant) streams and small rivers of South America, where the water is shallow and very murky. Most species are bottom-dwellers, foraging in sand, gravel or detritus.[2] The banks and sides of the streams are covered with a dense growth of plants and this is where the corys are found. They inhabit a wide variety of water types but tend toward soft, neutral to slightly acidic or slightly alkaline pH and 5-10 degrees of hardness. They can tolerate only a small amount of salt (some species tolerate none at all) and do not inhabit environments with tidal influences. They are often seen in shoals. Most species prefer being in groups and many species are found in schools or aggregations of hundreds or even thousands of individuals, usually of a single species, but occasionally with other species mixed in. Unlike most catfishes, which are nocturnal, these species are active during the daytime.

Their main food is bottom-dwelling insects and insect larvae and various worms, as well as some vegetable matter. Although no corys are piscivorous, they will eat flesh from dead fishes. Their feeding method is to search the bottom with their sensory barbels and suck up food items with their mouth, often burying their snout up to their eyes.

Corydoras是屬的淡水 鯰魚在家庭美鮎科和亞科Corydoradinae。該品種通常有更多的限制區域特有比其他callichthyids，但整個屬的分佈面積幾乎等於家族的分佈區域，除巴拿馬其中Corydoras不存在。 Corydoras物種分佈於南美，從安第斯山脈以東到特立尼達至大西洋沿岸的大西洋海岸。阿根廷北部的Ríode la Plata排水處。分配給Corydoras的物種顯示出各種各樣的身體形狀和顏色。 扇貝屬小魚，在SL。，中範圍為2.5至12厘米（1.0至4.7英寸），並通過其防彈衣和鋒利的通常有毒的刺保護其免受掠食者侵害。

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