Found in clear water with moderate current, about 50 cm depth . Adults inhabit streams and creeks in foothills with clear and cold water, and gravel to stone bottom. They occur in groups and feed predominantly on aquatic invertebrates .
Diagnosed from its congeners in Europe by the possession of the following characters: origin of anal fin below or behind base of last dorsal ray; in adults, anal fin length about equal to caudal peduncle length; anal fin margin straight to convex; distance between tip of first and last branched anal rays 1.1-1.8 times depth of caudal peduncle (with fin stretched out); dorsal head profile almost horizontal above eye, then abruptly descending towards tip of snout; patches of breast scales separated by unscaled area or connected anteriorly by 1-2 rows of scales; lateral line usually reaching almost to end of caudal peduncle; in preserved individuals, flank with a midlateral row of vertically elongated blotches whose depth is about 1/3-1/2 of body depth at same position; caudal peduncle depth 2.3-3.1 times in its length; interorbital width 33-43% HL; marked hump at nape in largest individuals .: elongated.
Behavioural data for Phoxinus Bigerri is currently being reviewed.
Freshwater; benthopelagic; potamodromous . Subtropical
The following diseases are known to affect Phoxinus Bigerri.
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