HomeCompare fishBlack sharkminnow vs Northern trout gudgeon Black sharkminnow vs Northern trout gudgeon: can they live together? Verdict: Not recommendedThe Northern trout gudgeon can be semi-aggressive or nip fins.An adult Black sharkminnow is about 5 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 6.5–7.5 suits both.Side by sideBlack sharkminnowNorthern trout gudgeonAdult size90 cm (35 in)17.5 cm (6.9 in)Minimum tank475 L (125 US gal)150 L (40 US gal)Temperature24–27°C (75–81°F)24–26°C (75–79°F)pH6.5–7.56.0–7.8Hardness2–15 dGH (36–268 ppm)–TemperamentPeacefulSemi-aggressiveCommunity tankGoodGoodCare levelEasyEasyDietOmnivoreOmnivoreSpecies profilesBlack sharkminnowLabeo chrysophekadionNorthern trout gudgeonMogurnda mogurnda