The common carp (Cyprinus Carpio) migrated into China either via trade or natural waterways. It’s not known when exactly when the carp were introduced to Japan, but it’s thought to have been through the transaction.
The common carp is an exceptional source of protein, so the rice farmers in the Niigata Prefecture began keeping them as a food staple for the long winter season. After the carp (Magoi) would reach 6 inches long, the rice farmers could capture and salt them so that they would endure the long winter season.
Around the mid-1800’s, some of the rice farmers began noticing that a number of the carp were mutating. Blotches of white and red were looking on them. They decided that it would be cool to keep out those ones and strain them. Pretty soon they’d developed different patterns. It’s amazing that these easy rice farmers were selectively breeding the carp to bring out amazing colors and patterns when at exactly the exact same time, the only real research happening was Gregor Mendel’s experiments with pea plants.
People from all over Japan watched the “Living Jewels”. During the next few decades, dozens of new varieties seemed. The next major leap in Koi keeping was the production of plastic bags in the 1960’s. Koi might be shipped all around the world faithfully and without high loss.
Today, Koi are bred around the world, but most individuals agree that the best ones come directly in the Niigata Prefecture in Japan. Koi are among the most wanted cosmetic fish in the world. You may find Koi hobbyists in just about any country.