Barbus biharicus can be distinguished by having significantly larger interorbital and preanal distance than B. balcanicus, B. carpathicus and B. petenyi, and significantly deeper head than B. carpathicus and B. petenyi. Compared to these 3 species, it has a tendency to have shorter, rounded snout, slightly longer pectoral fins, but slightly shorter anal fin. It can be further identified by having small dark spots on dorsal region of body and flanks and, to a lesser extent, head, and dark pigments on the fins occasionally form dark spots (the other species have heavy dark spots, which typically are arranged into rows on dorsal and caudal fins) (Ref. 106510).

Description: dorsal-fin rays ii-iii,7-8; anal-fin rays i-ii,4-5 (Ref. 106510).