HomeCompare fishHarlequin rasbora vs Coppernose barb Harlequin rasbora vs Coppernose barb: can they live together? Verdict: Not recommendedThe Coppernose barb is aggressive towards other fish.An adult Coppernose barb is about 4 times the length of a Harlequin rasbora and may eat it.Both are comfortable at 22–25°C (72–77°F).A pH of 6.5–7.0 suits both.Side by sideHarlequin rasboraCoppernose barbAdult size4 cm (1.6 in)17.5 cm (6.9 in)Minimum tank55 L (15 US gal)115 L (30 US gal)Temperature22–25°C (72–77°F)22–26°C (72–79°F)pH5.0–7.06.5–7.0Hardness5–12 dGH (89–214 ppm)5–10 dGH (89–178 ppm)TemperamentPeacefulAggressiveCommunity tankExcellentWith cautionCare levelEasyEasyDietOmnivoreOmnivoreSpecies profilesHarlequin rasboraTrigonostigma heteromorphaCoppernose barbRaiamas christyi