HomeCompare fishSlim betta vs Black sharkminnow Slim betta vs Black sharkminnow: can they live together? Verdict: Not recommendedThe Slim betta can be semi-aggressive or nip fins.An adult Black sharkminnow is about 9 times the length of a Slim betta and may eat it.Both are comfortable at 24–27°C (75–81°F).A pH of 6.5–7.5 suits both.Side by sideSlim bettaBlack sharkminnowAdult size10 cm (3.9 in)90 cm (35 in)Minimum tank75 L (20 US gal)475 L (125 US gal)Temperature24–30°C (75–86°F)24–27°C (75–81°F)pH6.5–7.56.5–7.5Hardness5–15 dGH (89–268 ppm)2–15 dGH (36–268 ppm)TemperamentSemi-aggressivePeacefulCommunity tankGoodGoodCare levelEasyEasyDietOmnivoreOmnivoreSpecies profilesSlim bettaBetta bellicaBlack sharkminnowLabeo chrysophekadion