Koi are actually a type of carp, and today they're some of the most expensive pet fish in the world. But why? Koi were originally raised in Japan in the 1700s when rice farmers first began ...

The keeping of Koi Carp became popular in the mid-1800s in ... across the country to showcase their fish collection. The most expensive koi ever sold for £1.4 million back in 2018.

Koi are actually a type of carp, and today they're some of the most expensive pet fish in the world. But why? Koi were originally raised in Japan in the 1700s when rice farmers first began ...

To designate the group of decorative carps, the Japanese use the word Nishiki-goi 錦鯉 (the words koi and goi are interchangeable), which is translated as brocade carp. Brocade is an expensive ...