HomeCompare fishFresh water puffer fish vs Northern trout gudgeon Fresh water puffer fish vs Northern trout gudgeon: can they live together? Verdict: Not recommendedThe Northern trout gudgeon can be semi-aggressive or nip fins.The Fresh water puffer fish is best kept in a species tank.An adult Fresh water puffer fish is about 4 times the length of a Northern trout gudgeon and may eat it.Both are comfortable at 24–26°C (75–79°F).A pH of 7.5–7.8 suits both.Side by sideFresh water puffer fishNorthern trout gudgeonAdult size67 cm (26 in)17.5 cm (6.9 in)Minimum tank1,515 L (400 US gal)150 L (40 US gal)Temperature24–26°C (75–79°F)24–26°C (75–79°F)pH7.5–8.36.0–7.8Hardness5–15 dGH (89–268 ppm)–Temperament–Semi-aggressiveCommunity tankNot suitableGoodCare level–EasyDiet–OmnivoreSpecies profilesFresh water puffer fishTetraodon mbuNorthern trout gudgeonMogurnda mogurnda