HomeCompare fishAfrican bonytongue vs Elephantnose fish African bonytongue vs Elephantnose fish: can they live together? Verdict: Not recommendedThe Elephantnose fish is aggressive towards other fish.The African bonytongue is aggressive towards other fish.An adult African bonytongue is about 4 times the length of a Elephantnose fish and may eat it.Both are comfortable at 24–28°C (75–82°F).A pH of 6.7–7.0 suits both.Side by sideAfrican bonytongueElephantnose fishAdult size100 cm (39 in)23 cm (9.1 in)Minimum tank455 L (120 US gal)115 L (30 US gal)Temperature24–30°C (75–86°F)23–28°C (73–82°F)pH6.7–7.56.0–7.0Hardness4–12 dGH (71–214 ppm)5–19 dGH (89–339 ppm)TemperamentAggressiveAggressiveCommunity tank–With cautionCare levelDifficultDifficultDietCarnivoreOmnivoreSpecies profilesAfrican bonytongueHeterotis niloticusElephantnose fishGnathonemus petersii