HomeCompare fishNorthern trout gudgeon vs Mosquitofish Northern trout gudgeon vs Mosquitofish: can they live together? Verdict: Not recommendedThe Mosquitofish can be semi-aggressive or nip fins.The Northern trout gudgeon can be semi-aggressive or nip fins.An adult Northern trout gudgeon is about 4 times the length of a Mosquitofish and may eat it.Both are comfortable at 24–26°C (75–79°F).A pH of 6.0–7.8 suits both.Side by sideNorthern trout gudgeonMosquitofishAdult size17.5 cm (6.9 in)4 cm (1.6 in)Minimum tank150 L (40 US gal)40 L (11 US gal)Temperature24–26°C (75–79°F)12–29°C (54–84°F)pH6.0–7.86.0–8.0Hardness–5–19 dGH (89–339 ppm)TemperamentSemi-aggressiveSemi-aggressiveCommunity tankGoodGoodCare levelEasyEasyDietOmnivoreOmnivoreSpecies profilesNorthern trout gudgeonMogurnda mogurndaMosquitofishGambusia affinis