KOI FISH NISHIKIGOI

KOI FISH GROWTH

How Fast Do Koi Fish Grow?

Koi fish are popular ornamental, freshwater fish that are typically kept in ornamental ponds. They were originally taken care of by rice farmers in early 19th-century Japan and are essentially colorful versions of the common carp, although they most certainly aren’t common! The word “Koi” actually translates to “love” or “affection” in Japanese.

If you’re considering purchasing or have recently purchased a Koi, and you’re wondering how big they get, you’ve come to the right place. We go over the sizes that you can expect and other pertinent information, such as factors that can affect your Koi’s growth.

How Big Will My Koi Fish Grow?

The average Koi fish, when fully mature, can measure up to 3 feet (36 inches) in length and can weigh 22 to 26 pounds! This is not to say that every Koi fish will end up this large, however, as several different factors might influence how large your Koi will become.

Domestic Koi kept in an aquarium might only grow to be around 12 to 15 inches, and the more traditional Japanese Koi can grow up to 26 inches in length.

These sizes depend on the type of Koi fish that you have. There are over 100 different kinds of Koi that all come in different sizes. The size of a mature Koi is typically dependent on the species more than on its environment, but the environment will still have an impact on the Koi’s growth rate.

Koi Fish Growth Chart

This chart is based on the growth rate of the average Koi, so not every fish will be the exact size that you see here. This is just to give you a rough idea of what you might expect as your Koi matures.

KOI GROWTH CHART

How Fast Do Baby Koi Fish Grow?

The size and colors of each baby Koi will depend on what kind of Koi you have. Just like with the previous chart, this is an average idea of what you can expect from your Koi as it matures, but the numbers won’t fit every fish exactly.

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