Red is the koi’s signature color but it is not only shade the species rocks. Koi fish have 6 type of color of cells in their skins such as red, yellow, black, white, blue or metallic. Origin koi fish were bred by the rice farmers in Japan, who wanted to see if they could bring out the spots of color that would sometimes appear on their food carp. Koi fish omnivores fish that will snack on everything from snails and insects to algae or plants.
The male fish will ram the females to encourage them to expunge their eggs. The female koi expel their eggs on vegetation or special breeding mats. The fertilised eggs then hatch after one or two weeks depending on the water temperature. Young koi ranges from 3 inches to 8 inches while mature koi 14 inches to 24 inches. However, some jumbo koi end up 32 inches to 36 inches long.
They are a regular competition named the top koi. Judges will pay attention on various healthy conditions such as skin, size, body shape and coloring. Kohaku, Sanke and Showa always top winning koi fish in the world. One of the most expensive koi fish sold was 1.8 millions dollars. This expensive fish was choose to have wide body and lots of red cells that concentrate large patches.