Taxonomy & naming
The species was described by Wu & Lin, in Wu, Lin, Chen, Chen & He, 1977, from Lian-Xian and Yang-Shan in Guangdong. The name refers to the Beijiang, the North River of the Pearl River system. Acrossocheilus is a genus of southern Chinese and Southeast Asian torrent barbs related to Crossocheilus.
Morphology
Acrossocheilus are slender, streamlined stream barbs with a ventral mouth and a fringed lip suited to grazing on rock, and many species have bold vertical bars. FishBase gives this species a maximum of 5 in SL; other details have not been described in the sources the atlas uses.
Habitat
It is known from the Beijiang drainage in northern Guangdong, southern China. FishBase lists it as a freshwater, benthopelagic fish of subtropical water, tolerant of brackish conditions. It is a stream fish of rocky, fast and cool to moderate water. Measured parameters have not been published.
Feeding
Genus members graze algae and biofilm from stones and take small invertebrates. The diet of this species has not been described specifically.
Mating
Mating behaviour has not been described.
Breeding
Captive breeding has not been documented.
In the aquarium
FishBase notes the species is used for food and for ornamental fish keeping. A hillstream set-up suits it: strong flow, high oxygen, cool to moderate temperature, rocks and a tight lid, with a group rather than a single fish. Care notes are based on related species.
Conservation
The IUCN Red List category is Least Concern, assessed in 2011. Specific threats have not been described.