HomeCompare fishNorthern trout gudgeon vs Silver moony Northern trout gudgeon vs Silver moony: can they live together? Verdict: With cautionThe Silver moony can be semi-aggressive or nip fins.The Northern trout gudgeon can be semi-aggressive or nip fins.Both are comfortable at 24–26°C (75–79°F).A pH of 7.0–7.8 suits both.Minimum tank for the pair: 190 L (50 US gal)Side by sideNorthern trout gudgeonSilver moonyAdult size17.5 cm (6.9 in)25 cm (9.8 in)Minimum tank150 L (40 US gal)190 L (50 US gal)Temperature24–26°C (75–79°F)24–28°C (75–82°F)pH6.0–7.87.0–8.5TemperamentSemi-aggressiveSemi-aggressiveCommunity tankGoodGoodCare levelEasyModerateDietOmnivoreOmnivoreSpecies profilesNorthern trout gudgeonMogurnda mogurndaSilver moonyMonodactylus argenteus