Can Boeseman's rainbowfish Live With Threadfin rainbowfish?

Detailed assessment

Both Boeseman's rainbowfish and Threadfin rainbowfish share a comfortable temperature range of 27.2–30°C (Boeseman's rainbowfish prefers 27.2–30°C, Threadfin rainbowfish prefers 22–30°C). Their pH ranges overlap well at 7–8, so water chemistry is compatible. Both species have low aggression scores (Boeseman's rainbowfish: 2, Threadfin rainbowfish: 1 out of 10), which supports peaceful cohabitation. The size difference is significant: Boeseman's rainbowfish reaches 9 cm while Threadfin rainbowfish reaches only 4 cm, and the larger species may view the smaller one as prey. Note: fish 2x+ larger may eat smaller tankmates With careful monitoring and adequate tank size these species can usually coexist, but be prepared to separate them if aggression or stress appears.