What Is A Koi Fish? 

A Koi fish is an ornamental species of carp domesticated that is kept indoors or outdoors in Koi ponds. They are extremely popular with enthusiasts, and are considered to be the official fish in Japan.

The Koi fish is often confused with carp but it's actually a member of the Cyprinidae family. The Koi fish has characteristics that make it more suitable for decorative use in water gardens, like a scale-free skin with huge scales, a protective mechanism known as lateral line sense organ, and swim bladders that aid in keeping them afloat in the water. https://www.kerutokoi.com/