Koi size: how big does it get?

Adults reach about 60 cm. Record sizes among the 137 Cyprinidae species on LumaReef: 1.3 cm (Strawberry Rasbora) to 200 cm (Yellowcheek).

Koi tank size: what is the minimum?

A tank at least 300 cm long. In LumaReef that is the Gallery tank or larger.

Koi water parameters: what does it need?

Temperature 15–24 °C, pH 7.0–8.2, hardness 8–20 °dGH. Cooler than most Cyprinidae on LumaReef (20–26 °C).

Koi tank mates: what can it live with?

It gets along with 21 of the 99 freshwater species in the catalogue, such as Fancy goldfish, Bristlenose pleco, and Swordtail.

Koi and plants: is it plant safe?

No, it may eat or uproot plants.

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Koi

Cyprinus rubrofuscus

A slow-cruising giant that roots at the bottom and feeds from your hand.

The Koi (Cyprinus rubrofuscus) is a tropical freshwater fish of the family Cyprinidae. It swims in midwater, close to the bottom. Adults grow to about 60 cm. In the aquarium it needs a tank at least 300 cm long and water at 15–24 °C.

Size: 60 cm
Smallest tank: 300 cm
Temperature: 15–24 °C
Care: Moderate

In the aquarium

Temperature15–24 °C

pH7.0–8.2

Hardness8–20 °dGH

Temperament: Peaceful
Diet: Omnivore
Activity: Moderate
Water layer: Bottom
Group: Happiest in a group of 5 or more
Plants: Eats plants

These values are compiled from real species data, and the LumaReef simulation is built to keep them true to life.

Which tank it fits

Nano60 cm · 65 litresToo small
Standard90 cm · 180 litresToo small
Wide120 cm · 300 litresToo small
Living room180 cm · 650 litresToo small
Showcase250 cm · 1,200 litresToo small
Gallery300 cm · 1,440 litres9 of them

Who it lives with

Gets along21 species

Caution47 species

Not together31 species

Aggressive with peaceful

In the wild

Water type: Freshwater
Climate zone: Tropical
Habitat: Midwater, close to the bottom

Conservation status

Classification

OrderCypriniformes
FamilyCyprinidae
GenusCyprinus
SpeciesCyprinus rubrofuscus
Described byLacépède, 1803

In other languages

English: Amur Carp
German: Koi-Karpfen
Spanish: Carpa china
French: Carpe Koï
Italian: Carpa Koi
Russian: Амурский сазан
Japanese: コイ(飼育型)
Chinese: 鯉

Quick answers

Koi size: how big does it get?: Adults reach about 60 cm. Record sizes among the 137 Cyprinidae species on LumaReef: 1.3 cm (Strawberry Rasbora) to 200 cm (Yellowcheek).
Koi tank size: what is the minimum?: A tank at least 300 cm long. In LumaReef that is the Gallery tank or larger.
Koi water parameters: what does it need?: Temperature 15–24 °C, pH 7.0–8.2, hardness 8–20 °dGH. Cooler than most Cyprinidae on LumaReef (20–26 °C).
Koi tank mates: what can it live with?: It gets along with 21 of the 99 freshwater species in the catalogue, such as Fancy goldfish, Bristlenose pleco, and Swordtail.
Koi: alone or in a group?: Keep at least 5 together.
Koi and plants: is it plant safe?: No, it may eat or uproot plants.