but the fish is really sparkling and beautiful

This article is intended for those of you who have learned about koi and have a little understanding of the basic types of koi.
Body
As people often tell each other "best shape second skin", it is indeed a not wrong comment to choose a standard koi. In the koi evaluation criteria, the body accounts for 60% for a standard koi. When choosing fish, you should choose koi with a good body structure, both balanced and round koi length (seen from above) like the shape of a submarine. A small note for you