How big do Koi fish grow?

If you a Koi beginner, you probably imagine their size as 20 inches based on your experience of seeing a Koi in public, but I’m sure the biggest exhibited Koi will blow your mind and break a Koi-size-record in your head.

In the 38th All Japan Koi Show, a Koi in a size of 97cm (about 38”) won the biggest Koi of the year, and it’s the largest Koi in history so far. Since Nishikigoi are mutated from carp (which have gotten as big as 1.5 m and almost 100lbs) we think we may see koi that are as large as these wild carp one day!

Read about our best types of koi food guide for increasing color and growth size.

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Category: General Koi Facts

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