▁Ram os - T af ur , ▁ 2 0 0 6 ▁ ▁Hyp ol ob oc era ▁ste ind ach ner i ▁P ret z mann , ▁ 1 9 6 8 ▁ ▁Hyp ol ob oc era ▁tri ang ula ▁Ram os - T af ur , ▁ 2 0 0 6 ▁ ▁Hyp ol ob oc era ▁u c ay al ensis ▁Rodríguez ▁& ▁Su á rez , ▁ 2 0 0 4 ▁ ▁Hyp ol ob oc era ▁ve le zi ▁Cam pos , ▁ 2 0 0 3 ▁ ▁References ▁ ▁Category : P se ud oth el ph us idae <0x0A> </s> ▁The ▁Congo ▁p uffer ▁or ▁pot ato ▁p uffer ▁( T etra odon ▁mi urus ) ▁is ▁a ▁fresh water ▁p uffer fish ▁found ▁in ▁areas ▁of ▁the ▁Congo ▁River ▁in ▁Africa , ▁including ▁rap ids . ▁ ▁Congo ▁pu ff ers ▁grow ▁to ▁about ▁ 1 5   cm ▁long . ▁ ▁In ▁the ▁wild , ▁they ▁feed ▁mainly ▁on ▁fish , ▁but ▁in ▁capt ivity ▁they ▁eat ▁different ▁food s , ▁such ▁as ▁blood w orm s ▁and ▁river ▁sh rim p . ▁ ▁They ▁are ▁in active ▁fish es , ▁sp ending ▁most ▁of ▁their ▁time ▁buried ▁in ▁sand ▁or ▁other ▁substr ate , ▁with ▁the ▁ability ▁to ▁adapt ▁their ▁colour ation ▁to ▁hide ▁from ▁potential ▁pre y . ▁ ▁However , ▁many ▁colour ▁variations ▁are ▁seen ▁within ▁the ▁species , ▁r anging ▁from ▁black ▁to ▁sand y ▁to ▁bright ▁red .