Family: Cyprinidae
The large, colorful East Asian pond carp, prized for its metallic patterns and remarkable longevity.
Koi are pond carp bred into swimming calligraphy. They live for decades, recognize their keeper, and need volumes measured in thousands of liters — a commitment of space before anything else.
Difficulty: moderate. Mostly peaceful; some species nip fins. Shoaling; keep in groups of 6 or more.
Hold 12–28 °C and keep it stable — 12–28 °C curated husbandry range. Room temperature to heated, depending on origin.
Adults reach 75–110 cm; it is bottom-dwelling. Plan for at least 500 litres.
Omnivore; prepared foods with regular vegetable matter. It forages naturally over fine gravel and sand, so let some food reach the bottom.
Yes, with care. Mostly peaceful; some species nip fins — pair it with Similar-sized peaceful community fish — Similar size and water needs and skip Much smaller fish — May outcompete or bully tiny tankmates.
Comes from East Asia: clear streams and rivers over gravel. Expect moderate, well-oxygenated current and appreciates well-oxygenated water.
Not a noted jumper — a standard cover still keeps dust and spray in.
Egg-scatterer; no parental care. Males often slimmer and more colourful.