If you’re here, you probably already have interest in koi. If you're anything like me, you're "koi kichi" which means koi crazy. :)
I became a koi hobbyist in 2006 and had koi as pets. My favorite variety was shusui which is Japanese for “autumn sunset.”
Shusui
If you don't know shusui, this is a charming, doitsu (scaleless) koi variety, with pale blue or white skin, red markings on the sides and belly, with a bold blue symmetrical double line of scales along the dorsal ridge.
A clean head and face are desirable on this variety, but sometimes you'll see shusui with cute birthmarks on the face, including one called "kuchi beni" which means "lipstick." :)