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Acantopsis choirorhynchos


Acantopsis choirorhynchos
Horse Face Loach
马头鳅
The horseface loach or horsehead loach, Acantopsis choirorhynchos, is a freshwater and brackish fish in the loach family (Cobitidae). This bottom-dwelling fish is native to the swift, clear streams and rivers of mainland and archipelagic Southeast Asia, from India to Indonesia through the Chao Phraya and Mekong river basins. It can also be found in flooded fields.
A very similar species is the unofficially named longnose loach, Acantopsis octoactinotos, from which the horseface can be distinguished by the latter's down-turned (horse-like) nose. Additionally, the horseface loach buries itself in the bottom substratum (if silt or fine sand); the longnose loach does not. The horseface loach is fast moving; the longnose is rather slow. However, the longnose is more aggressive, regularly feeding on juvenile fishes.
The horseface loach's native substrate is one of sand or gravel, wherein it will characteristically burrow itself. These loaches spend much of their time buried in the substrate, leaving only their eyes uncovered. Due to this incessant burrowing, any live plants should be potted to avoid uprooting. The use of floating plants is recommended, as these loaches prefer subdued lighting. Horseface loaches are not picky eaters, but live food (such as tubifex) is relished.
The horseface loach is most active at night and mostly keeps to itself. It attains a maximum size of 20 centimetres in length, but is considered mature from 6 centimetres.

学名:Acantopsis choirorhynchos, 别名:马头鳅。科种:鳅科和鲶科,属鲶形目。产地:中国西双版纳(澜沧江下游江段)、泰国等地。形态特征:体细长,稍侧扁。身体最高处在胸鳍起点垂直上方,向前急剧下斜,向后较平直,头长,侧扁。吻前端略尖。眼上位,腹视不可见,明显位于头的后半部。口下位,上唇边缘有发达而稀疏的突起,侧端连于口角须的基部。唇后沟根深。须3对,吻须2对,口角须1对。背鳍外缘微凸;胸鳍左右基部紧*在一起;腹鳍短小,左右基部紧靠;臀鳍短;尾鳍深凹。体被细鳞,头部无鳞。侧线走向平直,沿侧线有十余个小黑斑,背部正中隐约可见横跨的数个棕色大斑。吻端至眼前缘有两黑色纵条纹,各鳍浅棕色,无斑。体长可达20毫米。
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