Adorable Butterfly Koi Fish | A Quick Exciting Overview

Adorable Butterfly Koi Fish

The Japanese were the first people to produce Butterfly Koi fish by breeding the wild fish with the traditional Koi. This fish type got its name due to the presence of long fins. Most people also call this Koi as Dragon Koi. Moreover, It is one of the famous Koi fish varieties. It was produced by crossbreeding a river fish with a traditional Koi. The main aim of this crossbreeding technique is to create a fish with higher hardiness than regular Koi. With the help of the Indonesian river carp, it was easily achieved.

Few notable features of Butterfly Koi are long pectoral, long barbells, and tail fins. Japanese would call Butterfly Koi as “hire naga goi” or “onagaoi,” which means long-tail carp. Randy LeFever one of the most famous Japanese breeders who has said that the fish looks like butterflies, and it was named after his saying as Butterfly Koi fish. Moreover, Butterfly Koi or Dragon Koi fish is a recently developed fish during the mid of the 20th century. For more details about Koi, See the History About Koi Carp.

Few Things About The Adorable Butterfly Koi Fish

Adorable Butterfly Koi Fish A Quick Exciting Overview

Butterfly Koi grow slowly within a small pond, but its fins can grow larger, reaching the end of the body. Most people love this Butterfly Koi because of its graceful swimming in water. Another beautiful feature of this fish is the presence of metallic hue skin type. The metallic hue and fins color varies on selective breeding.

Due to the graceful swimming, few people tend to keep the young Butterfly koi in the tank. You could spend the time just watching this beautiful Koi swimming. Sometimes the rough bottom ponds may damage the fins of Butterfly Koi. So, it is necessary to build an excellent bottom layer pond to prevent the damage of fins.


The Butterfly Koi or Dragon Koi differ from the traditional Koi. The Japanese would call the Koi as the Nishikigoi, and these long-finned carps are known as the Hirenagagoi. The name Koi used by breeders to increase the popularity and Market value. During the best Koi Competitions, the judging criteria differ for traditional Koi and Butterfly Koi. To know more about the Koi, see Interesting Facts About Koi Carp.

Judging Criteria for Butterfly Koi

Below are the Judging criteria that have been evolved for years and are used by the modern Judges. KOI USA Magazine has published a set of rules for judging the Butterfly Koi. Moreover, these rules only apply to Butterfly Koi or Dragon Koi.


The Butterfly Koi carp types mostly have a slender shape in nature, but the traditional Koi mostly have an oval shape. Moreover, the judges use the top-down viewing angle for judging the regular Koi.

Fin Body Ratio

In Koi competitions, fin body ratio is an essential rule for judging the Nishikigoi. In this case of the Butterfly Koi, this ratio highly exceeds. Because most regular Koi have a fin/body ratio of about 1:5, but the Butterfly Koi have about 1:1 or 1:3 rate.

Body Patterns

Butterfly Koi has a slight difference in the pattern comparing with other regular Koi. Furthermore, the classification of traditional Koi was also done based on the body pattern.

Koi organizations such as UK Koi Judges Association and Japan’s Zen Nippon Airinkai ZNA has excluded the Butterfly Koi from the competition. But Associated Koi Clubs of America (AKCA) has a unique contest with new standards for the judging Butterfly Koi with long fins.

Butterfly Koi Fish Lovers

The traditional Koi keepers would love keeping Butterfly Koi fish than the regular ones. The superiority of Butterfly Koi is the main reason for this popularity. This Koi type is bred by the Japanese and often sold by the reputable Koi sellers. Europeans and Asians would love keeping Butterfly Koi in their pond than other Koi varieties. Moreover, the specialized Koi breeders have this Koi fish readily available for sale. The North Americans would call this Koi as “American koi.”

By the year 2020, the Butterfly Koi has gained a lot of popularity all over the world. Furtherly, these Koi types are also available in various colors and of good quality. Like the traditional Koi, the Butterfly Koi has the same food requirement and pond type for healthy living.

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