Other Koi Names: Koi, Carp, Common Carp, Leather Carp, Mirror Carp

Koi Scientific Name: Cyprinus carpio carpio

Koi (Cyprinus carpio carpio))

Temperature Range: 61°F-88°F
pH Range: 6.4-8
Hardness Range: 5-15°

Family: Cyprinidae

Species Type: Cyprinids

Koi Adult Size: 45 inches (cm)

Koi Life Expectancy: 18 years

Koi Habitat: Asian Rivers

Koi Minimum Tank Size: 800 gallons

Koi Temperament: Active; Koi are very peaceful with a variety of pond life. They will eat any eggs in the pond, and may accidentally eat young fry until 1 inch in length. Pond guppies and mosquito fish may be eaten by large Koi. Koi agression can be seen in the early spring during breeding, but should be limited to chasing and bumping into other Koi.

Koi Diet & Nutrition: Omnivorous - does well with pellet foods designed for koi.

Koi Description: Feeding should be reduced or stopped completely once the pond temp drops below 50 degrees F. If any foods are fed keep it to the minimal and feed foods very low in proteins. If you have a small pond (less than 1500 gallons) do not feed at all under 50 degrees F. For larger ponds the fish should not be fed at all once the pond is 45 degrees F or lower. 1000 (US gallons) or more is the minimal pond size to avoid sunting and early death. Pond must have good bio-filtration to handle the heavy waste produced by this species. This fish is best left to ponds but may be displayed in an aquarium when young.

Tank Mate Compatibility: Other Koi, goldfish and frogs.

Koi Breeding & Spawning: Koi first become sexually mature between 1 and 2 feet in length (3-5 years in age). Look for breeding to take place in spring with the fish scattering eggs all over the pond. They will immediately begin eating the eggs. Expect well over 70,000 eggs from every mature female.

Determining Koi Sex: Males tend to be slimmer with pointed pectoral fins. Sexually mature males are usually very easy to identify as they chase the females. Males are also generally smaller than the females. Females have more robust bodies tending to look plump and have rounded pectoral fins.

Aquarium Region: All over

Koi Diseases: None specific to species

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