These three are the most popular in Japan, the Kohaku, the Showa, and the Sanke.
The colored Koi with a black pattern.
The black Koi with a colored pattern.
The blue/grey Koi with a red pattern.
The Koi with a pattern only on their Maruten spots.
The metallic Koi with only one color for a pattern.
The Koi that have black shading over their patterns.
Koi that have metallic patterns.
These Koi have a grey shading pattern on their scales.