HomeCompare fishBloodfin tetra vs Black ghost Bloodfin tetra vs Black ghost: can they live together? Verdict: Not recommendedThe Black ghost is aggressive towards other fish.An adult Black ghost is about 9 times the length of a Bloodfin tetra and may eat it.Both are comfortable at 23–28°C (73–82°F).A pH of 6.0–8.0 suits both.Side by sideBloodfin tetraBlack ghostAdult size5.5 cm (2.2 in)50 cm (20 in)Minimum tank75 L (20 US gal)210 L (55 US gal)Temperature18–28°C (64–82°F)23–28°C (73–82°F)pH6.0–8.06.0–8.0Hardness10–30 dGH (178–535 ppm)5–10 dGH (89–178 ppm)TemperamentPeacefulAggressiveCommunity tankExcellentGoodCare levelEasyModerateDietOmnivoreOmnivoreSpecies profilesBloodfin tetraAphyocharax anisitsiBlack ghostApteronotus albifrons