My koi pond is a pond of multi colored fish
Wow,  how does it look like? 
Very colorful, several varieties are recognized by the Japanese 
OK.  Have never heard of koi pond before,  tell me more about it
Asia may be necessary, as the genetic variations do not fully match the currently recognized species pattern, with one study of mtDNA suggesting that koi are close to the Southeast Asian carp, but not necessarily the Chinese.
Varieties.
Koi varieties are distinguished by coloration, patterning, and scalation. Some of the major colors are white, black, red, yellow, blue, and cream. Although the possible colors are virtually limitless, breeders have identified and named a number of specific categories. The most notable category is
Koko-en Garden, in Himeji. The two gardens will actively promote each other's garden from now on.
Features.
This tranquil and beautiful setting features more than 1,500 tons of hand picked rock, stone footbridges, lanterns and more than 50 varieties of plants. While strolling the path, guests will enjoy flowing streams, a 12-foot waterfall, and a Koi pond with over 300 colorful Koi fish. One of the main attractions at the Japanese Friendship Garden is the Japanese Tea House.3.5 total acres with a koi pond