HomeCompare fishForktail rainbowfish vs Black sharkminnow Forktail rainbowfish vs Black sharkminnow: can they live together? Verdict: Not recommendedAn adult Black sharkminnow is about 18 times the length of a Forktail rainbowfish 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 sideForktail rainbowfishBlack sharkminnowAdult size5 cm (2 in)90 cm (35 in)Minimum tank75 L (20 US gal)475 L (125 US gal)Temperature24–26°C (75–79°F)24–27°C (75–81°F)pH6.0–8.06.5–7.5Hardness5–12 dGH (89–214 ppm)2–15 dGH (36–268 ppm)TemperamentPeacefulPeacefulCommunity tankGoodGoodCare levelEasyEasyDietOmnivoreOmnivoreSpecies profilesForktail rainbowfishPseudomugil furcatusBlack sharkminnowLabeo chrysophekadion