Can Freshwater angelfish Live With Common otocinclus?

Detailed assessment

Both Freshwater angelfish and Common otocinclus share a comfortable temperature range of 24–25°C (Freshwater angelfish prefers 24–30°C, Common otocinclus prefers 20–25°C). Their pH ranges overlap well at 6–7.5, so water chemistry is compatible. Freshwater angelfish has a temperament score of 3 (out of 5), which means it can be territorial or aggressive toward Common otocinclus (score 1). They occupy different water columns (Freshwater angelfish: middle, Common otocinclus: bottom), which reduces direct competition for space. The size difference is significant: Freshwater angelfish reaches 15 cm while Common otocinclus reaches only 3.3 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.