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Koi Tank Mates

All 90 pair guides, ordered by search value and practical compatibility.

Care baseline

Large pond fish that require hundreds of gallons and cool water. Will eat any fish small enough to fit in their mouth.

Temperature50–75°F
pH7.0–8.5
Adult size24 in
Minimum group2

Compatibility guides

Koi + GoldfishSEO priority 71/10086/100 · CompatibleKoi + Betta FishSEO priority 65/1000/100 · Not CompatibleKoi + GuppySEO priority 63/1000/100 · Not CompatibleKoi + Neon TetraSEO priority 63/1000/100 · Not CompatibleKoi + AngelfishSEO priority 62/1000/100 · Not CompatibleKoi + DiscusSEO priority 61/1000/100 · Not CompatibleKoi + OscarSEO priority 61/1000/100 · Not CompatibleKoi + MollySEO priority 60/1000/100 · Not CompatibleKoi + Bristlenose PlecoSEO priority 59/1000/100 · Not CompatibleKoi + Corydoras CatfishSEO priority 59/1000/100 · Not CompatibleKoi + PlatySEO priority 59/1000/100 · Not CompatibleKoi + Cherry ShrimpSEO priority 58/1000/100 · Not CompatibleKoi + Blue TangSEO priority 57/1000/100 · Not CompatibleKoi + Zebra DanioSEO priority 57/1000/100 · Not CompatibleKoi + Cardinal TetraSEO priority 56/1000/100 · Not CompatibleKoi + Tiger BarbSEO priority 55/1000/100 · Not CompatibleKoi + African Butterfly FishSEO priority 43/1000/100 · Not CompatibleKoi + Black Ghost KnifefishSEO priority 43/1000/100 · Not CompatibleKoi + Black Neon TetraSEO priority 43/1000/100 · Not CompatibleKoi + Black Phantom TetraSEO priority 43/1000/100 · Not CompatibleKoi + Black Ruby BarbSEO priority 43/1000/100 · Not CompatibleKoi + Bolivian RamSEO priority 43/1000/100 · Not CompatibleKoi + Bosemans RainbowfishSEO priority 43/1000/100 · Not CompatibleKoi + Cherry BarbSEO priority 43/1000/100 · Not CompatibleKoi + Chili RasboraSEO priority 43/1000/100 · Not CompatibleKoi + Clown KnifefishSEO priority 43/1000/100 · Not CompatibleKoi + Clown LoachSEO priority 43/1000/100 · Not CompatibleKoi + Clown PlecoSEO priority 43/1000/100 · Not CompatibleKoi + Congo TetraSEO priority 43/1000/100 · Not CompatibleKoi + Coral BeautySEO priority 43/1000/100 · Not CompatibleKoi + Denison BarbSEO priority 43/1000/100 · Not CompatibleKoi + Diamond TetraSEO priority 43/1000/100 · Not CompatibleKoi + Dwarf Chain LoachSEO priority 43/1000/100 · Not CompatibleKoi + Dwarf GouramiSEO priority 43/1000/100 · Not CompatibleKoi + Electric Yellow CichlidSEO priority 43/1000/100 · Not CompatibleKoi + Ember TetraSEO priority 43/1000/100 · Not CompatibleKoi + Fire EelSEO priority 43/1000/100 · Not CompatibleKoi + Firefish GobySEO priority 43/1000/100 · Not CompatibleKoi + Flame AngelfishSEO priority 43/1000/100 · Not CompatibleKoi + Foxface RabbitfishSEO priority 43/1000/100 · Not CompatibleKoi + Frontosa CichlidSEO priority 43/1000/100 · Not CompatibleKoi + Giant DanioSEO priority 43/1000/100 · Not CompatibleKoi + Glass CatfishSEO priority 43/1000/100 · Not CompatibleKoi + Glowlight DanioSEO priority 43/1000/100 · Not CompatibleKoi + Glowlight TetraSEO priority 43/1000/100 · Not CompatibleKoi + Green Terror CichlidSEO priority 43/1000/100 · Not CompatibleKoi + Harlequin RasboraSEO priority 43/1000/100 · Not CompatibleKoi + Hillstream LoachSEO priority 43/1000/100 · Not CompatibleKoi + Honey GouramiSEO priority 43/1000/100 · Not CompatibleKoi + Jewel CichlidSEO priority 43/1000/100 · Not CompatibleKoi + Julii CorySEO priority 43/1000/100 · Not CompatibleKoi + Keyhole CichlidSEO priority 43/1000/100 · Not CompatibleKoi + Kuhli LoachSEO priority 43/1000/100 · Not CompatibleKoi + Lemon TetraSEO priority 43/1000/100 · Not CompatibleKoi + LionfishSEO priority 43/1000/100 · Not CompatibleKoi + Moonlight GouramiSEO priority 43/1000/100 · Not CompatibleKoi + Mystery SnailSEO priority 43/1000/100 · Not CompatibleKoi + Neon RainbowfishSEO priority 43/1000/100 · Not CompatibleKoi + Nerite SnailSEO priority 43/1000/100 · Not CompatibleKoi + OtocinclusSEO priority 43/1000/100 · Not CompatibleKoi + Pajama CardinalfishSEO priority 43/1000/100 · Not CompatibleKoi + Panda CorySEO priority 43/1000/100 · Not CompatibleKoi + Pea PufferSEO priority 43/1000/100 · Not CompatibleKoi + Peacock CichlidSEO priority 43/1000/100 · Not CompatibleKoi + Pearl DanioSEO priority 43/1000/100 · Not CompatibleKoi + Peppered CorySEO priority 43/1000/100 · Not CompatibleKoi + Percula ClownfishSEO priority 43/1000/100 · Not CompatibleKoi + Pygmy CorydorasSEO priority 43/1000/100 · Not CompatibleKoi + Rainbow SharkSEO priority 43/1000/100 · Not CompatibleKoi + Red Eye TetraSEO priority 43/1000/100 · Not CompatibleKoi + Rosy BarbSEO priority 43/1000/100 · Not CompatibleKoi + Royal GrammaSEO priority 43/1000/100 · Not CompatibleKoi + Senegal BichirSEO priority 43/1000/100 · Not CompatibleKoi + Serpae TetraSEO priority 43/1000/100 · Not CompatibleKoi + Severum CichlidSEO priority 43/1000/100 · Not CompatibleKoi + Silver ArowanaSEO priority 43/1000/100 · Not CompatibleKoi + Silver DollarSEO priority 43/1000/100 · Not CompatibleKoi + Sparkling GouramiSEO priority 43/1000/100 · Not CompatibleKoi + Sterbai CorySEO priority 43/1000/100 · Not CompatibleKoi + SwordtailSEO priority 43/1000/100 · Not CompatibleKoi + Texas CichlidSEO priority 43/1000/100 · Not CompatibleKoi + Threadfin RainbowfishSEO priority 43/1000/100 · Not CompatibleKoi + Three Spot GouramiSEO priority 43/1000/100 · Not CompatibleKoi + Watchman GobySEO priority 43/1000/100 · Not CompatibleKoi + Weather LoachSEO priority 43/1000/100 · Not CompatibleKoi + X Ray TetraSEO priority 43/1000/100 · Not CompatibleKoi + Yellow TangSEO priority 43/1000/100 · Not CompatibleKoi + Yoyo LoachSEO priority 43/1000/100 · Not CompatibleKoi + Zebra LoachSEO priority 43/1000/100 · Not CompatibleKoi + Zebra PlecoSEO priority 43/1000/100 · Not Compatible