Can Siamese fighting fish Live With Pygmy corydoras?

Detailed assessment

Both Siamese fighting fish and Pygmy corydoras share a comfortable temperature range of 24–26°C (Siamese fighting fish prefers 24–30°C, Pygmy corydoras prefers 22–26°C). Their pH ranges overlap well at 6–8, so water chemistry is compatible. Siamese fighting fish has a temperament score of 5 (out of 10), which means it can be territorial or aggressive toward Pygmy corydoras (score 1). They occupy different water columns (Siamese fighting fish: middle, Pygmy corydoras: bottom), which reduces direct competition for space. The size difference is significant: Siamese fighting fish reaches 6.5 cm while Pygmy corydoras 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.