How many descriptive terms for Sumi do we have, how many refer to placement of sumi, and how do they vary from variety to variety? But since there appear to be a great deal of terms to decribe sumi and it's placement, it must be pretty important.
Sumi on gills.
A red Koi with black markings. (Bekko)
A red Koi with white tips to the pectoral and caudal fins (Kawarimono).
A Koi whose black scales are outlined in white. More commonly known as Sumi-nagashi. (Kawarimono).
Late developing black markings.
Dark spot found on head of young koi, caused by thin skin.
Trunk sumi. Large sumi that wraps down the lateral line.
Sesame sumi. Small, scattered sumi.
Black diagonal pattern that runs diagonally across the head.
Black pattern around the mouth and nose area.
String sumi. Shape of sumi that is long and thin, like string, but not necessarily straight.
Solid, sanke type markings.
Broom sumi. Sumi on pec fins.