The video captured in Ha Noi city, Viet Nam on June 01. Video shows! In the aquarium there are many koi fish with many different colors. Unique Colour Koi fish Beautiful.

A Koi carp or Cyprinus Carpio is better known under the name Japanese koi carp. It is a splendid coloured fish, which, under favourable conditions, can grow to a length of 28 to 32 inch and may become as many as 40 years old. A koi carp will be soon trained to the hand and will even eat out of your hand. A koi pond should be at least 60 in deep (preferably deeper still). This necessary to keep the temperature in the pond as constant as possible and for the fish to hibernate. For the number of koi in your pond you should go by the rule, one fish per 1,000 litres of pond water.

Koi (nishikigoi) are a group of fish that are ornamental varieties of domesticated common carp that are kept for decorative purposes in outdoor koi ponds or water gardens.

The word koi comes from Japanese, simply meaning "carp." It includes both the dull grey fish and the brightly colored varieties. What are known as koi in English are referred to more specifically as nishikigoi in Japan (brocaded carp).