Can Siamese fighting fish Live With Common otocinclus?

Detailed assessment

Both Siamese fighting fish and Common otocinclus share a comfortable temperature range of 22–25°C (Siamese fighting fish prefers 22–30°C, Common otocinclus prefers 20–25°C). Their pH ranges overlap well at 6–7.5, so water chemistry is compatible. Siamese fighting fish is moderately assertive (temperament score 5 out of 5) but generally tolerates peaceful tankmates like Common otocinclus (score 1) when given enough space and cover. They occupy different water columns (Siamese fighting fish: middle, Common otocinclus: bottom), which reduces direct competition for space. Overall, these two species can coexist peacefully in a well-maintained community tank with appropriate space.