HomeCompare fishViolet goby vs Silver moony Violet goby vs Silver moony: can they live together? Verdict: With cautionThe Silver moony can be semi-aggressive or nip fins.The Violet goby is best kept in a species tank.The Violet goby can be semi-aggressive or nip fins.The Violet goby grows about twice as long as the Silver moony; watch for bullying or predation.Both are comfortable at 24–26°C (75–79°F).A pH of 7.0–8.0 suits both.Minimum tank for the pair: 210 L (55 US gal)Side by sideViolet gobySilver moonyAdult size50 cm (20 in)25 cm (9.8 in)Minimum tank210 L (55 US gal)190 L (50 US gal)Temperature20–26°C (68–79°F)24–28°C (75–82°F)pH7.0–8.07.0–8.5Hardness9–19 dGH (161–339 ppm)–TemperamentSemi-aggressiveSemi-aggressiveCommunity tankNot suitableGoodCare levelModerateModerateDiet–OmnivoreSpecies profilesViolet gobyGobioides broussonnetiiSilver moonyMonodactylus argenteus