Can Galaxy rasbora Live With Zebra danio?

Detailed assessment

Both Galaxy rasbora and Zebra danio share a comfortable temperature range of 20–25°C (Galaxy rasbora prefers 20–26°C, Zebra danio prefers 18–25°C). Their pH ranges overlap well at 6.5–7.5, so water chemistry is compatible. Both species have low aggression scores (Galaxy rasbora: 1, Zebra danio: 1 out of 5), which supports peaceful cohabitation. They occupy different water columns (Galaxy rasbora: middle, Zebra danio: all), which reduces direct competition for space. The size difference is significant: Zebra danio reaches 5 cm while Galaxy rasbora reaches only 2.1 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.