HomeCompare fishSpotted ctenopoma vs Siamese fighting fish Spotted ctenopoma vs Siamese fighting fish: can they live together? Verdict: Not recommendedThe Siamese fighting fish can be semi-aggressive or nip fins.The Spotted ctenopoma is aggressive towards other fish.The Spotted ctenopoma grows about twice as long as the Siamese fighting fish; watch for bullying or predation.Both are comfortable at 24–25°C (75–77°F).A pH of 6.0–8.0 suits both.Side by sideSpotted ctenopomaSiamese fighting fishAdult size15 cm (5.9 in)6.5 cm (2.6 in)Minimum tank210 L (55 US gal)20 L (5 US gal)Temperature5–25°C (41–77°F)24–30°C (75–86°F)pH6.0–8.06.0–8.0Hardness5–12 dGH (89–214 ppm)5–19 dGH (89–339 ppm)TemperamentAggressiveSemi-aggressiveCommunity tankGoodGoodCare levelEasyEasyDietCarnivoreOmnivoreSpecies profilesSpotted ctenopomaCtenopoma acutirostreSiamese fighting fishBetta splendens