15 Fin-tastic Facts About The Japanese Koi For Kids

Japanese koi facts tell us about these beautiful ornamental fishes are known for their vibrant colors that can bring peace and good fortune.

Are you a fish lover? If you are thinking about transforming your water garden into beautiful prosperity and colorful ones, these ornamental fishes are for you. What is more elegant in decorating your water pond? The koi fish, of course!

These koi fish that originated from Eastern Asia have a rich history. There are varieties of koi fishes that range in color, patterns, and scales.

Colored variations of the Amur carp (Cyprinus rubrofuscus) are raised for decorative purposes in water gardens and are known as koi or brocaded carp. Koi and the goldfish are believed to have been bred from a common origin. The koi fish were originally brought to Japan as a food source. The fish koi was gifted to the Japanese emperor in 1914, which graced him with good fortune.

Koi fish are very intelligent. Like other pet dogs and cats, they can be trained to eat out of your hand and sometimes even out of your mouth. Moreover, they have many virtues such as symbols of perseverance and endurance, strength, and individualism in Asian cultures.

There are more interesting facts about Japanese fish. Find more exciting content on fish facts such as saltwater fish and sailfish.

Japanese Koi

Fact File

What do they prey on?

Pond Plants, Fish, Eggs, Lettuce, Watermelon, Peas

What do they eat?


Average litter size?

100,000 eggs

How much do they weigh?

30-35 lb (13-15 kg)

How long are they?

22-26 in (55-68 cm)

How tall are they?


What do they look like?

Black, Red, Orange, Yellow, White

Skin Type

Wet and slimy scales

What are their main threats?

Humans, Raccoons, Beavers, Muskrats, Opossums, Otters, Foxes, Bears

What is their conservation status?

Not Evaluated

Where you'll find them

Freshwater Bodies, Aquariums, Ponds







Scientific Name

Koi: Cyprinus rubrofuscus Japnese koi: Cyprinus carpio





Japanese Koi Interesting Facts

What type of animal is a Japanese koi?

Koi fish are the breeders of the Cyprinidae family. These fishes have long bodies, and they vary in colors like white, blue, yellow, black, or red. Most koi fish are omnivores.

What class of animal does a Japanese koi belong to?

The Actinopterygii family of animals includes koi fish. Koi fish symbolize love, prosperity, and luck.

How many Japanese koi are there in the world?

There are different varieties of koi fishes in the world. They are present in abundance. However, the exact number of Japanese koi living is unknown.

Where does a Japanese koi live?

Koi fish are natives of freshwater bodies of Japan.

What is a Japanese koi's habitat?

Wild koi fish habitat includes freshwater bodies near the Black Sea, Caspian Sea, and the Aral sea. Now, the koi fish is well known to the entire world, and they are found almost everywhere.

Who do Japanese koi live with?

A quality koi fish is a highly social fish that does not mind living with other fishes on the same farm. So, you can find a new koi living in groups with other goldfish, common carp, or wild fishes in the pond.

How long does a Japanese koi live?

Most of the oldest koi fish have a lifespan of 200+ years. A legendary great grandfather of this koi named Hanako is known to be lived as the oldest koi. Hanako lived for 226 years! However, most Japanese koi live an average of 30-40 years.

How do they reproduce?

The spawning method is used by koi fishes, just like other fish species use it. In this method, the female koi fish lay thousands of eggs, and males fertilize these eggs. Koi fishes lay around 100,000 eggs, and that's why they can produce a large number of offspring in a single breeding season. Some professional breeders are engaged in fish farming and ensure that the breeding goes on smoothly and there is a steady supply of these fishes.

What is their conservation status?

Since this beautiful common carp koi fish is numerous, it's not on the list of endangered species. However, they're domesticated ones, and so the precise figure of their population is not known. However, it has a wide distribution, and in many areas, it is a common species.

Japanese Koi Fun Facts

What do Japanese koi look like?

Japanese koi fish facts, they are known mainly for their friendly nature and intelligence.

Koi is a fish with a long body. These fishes are white, black, blue, red, cream, white & yellow. The color of the fish will usually rely upon the kind of fish. Along with colors, fish can have spots, which vary depending on the fish species. These koi fishes are known to spread love, as the word 'koi' means 'to love' in Japanese.

How cute are they?

Koi fish do not have an adorable appearance. However, because of their social nature and vibrant colors, they make a very good choice for domestic fish.

How do they communicate?

A koi fish usually creates vibrations, sounds, motion, impulses, and various smells to communicate.

How big is a Japanese koi?

A jumbo or a wild koi fish can grow up to 36 in (91 cm) long, making it almost six times bigger than a clownfish.

How fast can a Japanese koi move?

A koi can swim at a speed of 1-3 mph (1.6 - 4.8 kph).

How much does a Japanese koi weigh?

According to Japanese koi carp facts, a koi fish can weigh between 30-35 lb (13-15 kg).

What are the male and female names of the species?

There are no separate names for the male and the female species. Instead, they are simply addressed as male koi and female koi.

What would you call a baby Japanese koi?

Like the young ones of other fishes, the baby koi is called a fry or a fingerling.

What do they eat?

Koi fish are omnivores. Their food includes lettuce, pumpkins, and farm eggs, and they also enjoy eating insects, bugs, plants, and algae living at the bottom of the aquarium.

Did you know that the predators of these koi include muskrats, beavers, opossums, foxes, otters, and sometimes even bears?

Are they poisonous?

Koi fish are not poisonous.

Would they make a good pet?

Koi fish make very good pets.

Did you know...

Koi fishes don't have teeth, and that's why they can be trained like other pets to eat food from our hands. They can recognize the person feeding them regularly and becomes friendly with them. That's quite an interesting fact, right?

Although these fishes are ornamental and beautiful fishes that bring luck, it is considered an illegal fish in Australia. This is because it can pose a major threat to the aquatic environment through their eating habits and can also exceed native fish in numbers.

Why are Japanese koi so expensive?

In Japan, koi fish are transferred from generation to generation as a family heirloom. Due to their significance and vibrant colors, these fishes are sold at a very high price. A koi can be sold for between $10-$250 USD.

What do koi fish symbolize?

Everyone in Japan believes that koi fish symbolizes wealth, love, a successful career, and good fortune. The word koi means to love. The gold koi fish represents prosperity when a metallic koi represents success in business and career. Kohaku is a white-skinned koi fish. The word Kohaku means red and white. Kohaku was one of the first ornamental koi fish found in Japan.

Here at Kidadl, we have carefully created lots of interesting family-friendly animal facts for everyone to discover! Learn more about some other fish by checking out swai fish facts and skate fish facts.

You can even occupy yourself at home by coloring in one of our free printable Japanese Koi coloring pages.



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