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Non-Metallic Koi
Kohaku1Kohaku2 Kohaku
This variety is white with red (hi) markings. Ideally, the hi should be a uniform shade with well-defined edges. The white should be a pure snowy white. The hi should cover between 50 to 70 percent of the koi, and be visually balanced.
Sanke1Sanke2 Taisho Sanke
This variety is three-colored: a white fish with red (hi) and black (sumi) markings. All markings should be deep in hue with distinct edges. The white should be a snowy white. The pattern that hi and sumi markings create should be balanced when viewed individually and together.
ShowaKiShowaShowa2 Showa Sanshoku
This variety is also three-colored. These fish are predominantly black with red and white markings. The large sumi marking should be dark black and the hi a deep red.
Bekko1 Bekko
This variety is defined as a red, white, or yellow koi that have distinct black (sumi) markings over its body. The sumi markings of Bekko should be ebony black and small, placed evenly over the koi.
Utsuri1HiUtsuri1KiUtsuri1 Utsurimono
These are black koi with white, red or yellow markings. The sumi (black) markings on the head should reach down to the nose. Utsuri should have a striking, large sumi that is emphasized by the contrasting color.
Asagi1Asagi2 Asagi
These fish are predominantly blue or gray on their back and red or orange on their underside. The scalation is important; each scale should be darker blue in the center and lighter blue or white around the edges. The red (hi) should extend onto the base of the pectoral fins.
Shusui1Shusui2 Shusui
Similar to Asagi, these fish are blue or gray along the dorsal line with hi (red) extending from the belly to the lateral line. They are a partially scaled variety (doitsu), and the blue scales along the dorsal line should ideally be neatly aligned. The scaleless area on the back should be a pale sky blue.
Koromo1Koromo2 Koromo
The coloration of this group is similar to Kohaku, i.e., red (hi) markings on a white background. The most common variety, Ai-goromo, have hi scales with blue semicircular borders that give them a netted or lacy appearance. The hi should be a deep red to compliment the lace pattern overlay.
Goshiki2Goshiki3 Goshiki
As originally definded as part of the Kawarimono group, this is a five-color koi with white, red, black, blue, and dark blue. These colors are often mixed together on the body, giving a purplish appearance.
TanchoKohakuTanchoSankeTanchoShowaTanchoGoshigi Tancho
This group is distinguished by the red mark, tancho, on the head. This category includes koi from the Kohaku, Sanke, Showa and any other varieties that have the round red mark on the head, and no hi (red) markings anywhere else.
Ochiba1Ochiba1

Kawarimomo
All other non-metallic koi that are not categorized as part of any above-mentioned types belong to this big group.


Metallic Koi
Ogon1kohakukohaku Hikarimomo (Ogon)
This very popular variety is metallic koi of one color. The color should be an even hue all over the body with no patterns or markings.
Hutsuri1Hutsuri2Hutsuri3 Hikari-Utsurimono
This variety is the metallic version of Showa (predominantly black with red and white markings) or Utsuri (black koi with white, red or yellow markings).
Kujaku1D_KujakuKikokuryu Hikarimoyo-mono
This variety is comprised of metallic koi of more than one color but not with Utsuri or Showa markings.

Kinginrin
GinrinohakuGinrinSanke A Ginrin
A Kinginrin koi has sparkling scales with golden iridescence over hi (red), silver over white and sumi (black) areas. This iridescence is noticeable in the individual scales, rather than having the overall luster as seen on the Hikarimono group. The ginrin A group consists of ginrin Kohaku, Sanke and Showa.
ChagoiSoragoi B Ginrin
The Ginrin B group is comprised of the Kinginrin version of any type other than Kohaku, Sanke or Showa.