HomeCompare fishBlack sharkminnow vs Gulf gambusia Black sharkminnow vs Gulf gambusia: can they live together? Verdict: Not recommendedAn adult Black sharkminnow is about 18 times the length of a Gulf gambusia and may eat it.Both are comfortable at 24–25°C (75–77°F).A pH of 6.5–7.5 suits both.Side by sideBlack sharkminnowGulf gambusiaAdult size90 cm (35 in)5 cm (2 in)Minimum tank475 L (125 US gal)20 L (5 US gal)Temperature24–27°C (75–81°F)22–25°C (72–77°F)pH6.5–7.56.5–7.8Hardness2–15 dGH (36–268 ppm)–TemperamentPeaceful–Community tankGoodGoodCare levelEasy–DietOmnivoreOmnivoreSpecies profilesBlack sharkminnowLabeo chrysophekadionGulf gambusiaGambusia vittata