HomeCompare fishCrescent betta vs Black ghost Crescent betta vs Black ghost: can they live together? Verdict: Not recommendedThe Black ghost is aggressive towards other fish.An adult Black ghost is about 8 times the length of a Crescent betta and may eat it.Both are comfortable at 24–28°C (75–82°F).A pH of 6.0–7.0 suits both.Side by sideCrescent bettaBlack ghostAdult size6 cm (2.4 in)50 cm (20 in)Minimum tank40 L (11 US gal)210 L (55 US gal)Temperature24–30°C (75–86°F)23–28°C (73–82°F)pH6.0–7.06.0–8.0Hardness5–19 dGH (89–339 ppm)5–10 dGH (89–178 ppm)TemperamentPeacefulAggressiveCommunity tankGoodGoodCare levelEasyModerateDietOmnivoreOmnivoreSpecies profilesCrescent bettaBetta imbellisBlack ghostApteronotus albifrons