Aka (ah-kah) - basic red (there are a number of words for red - just as in English - red,
cardinal, crimson, scarlet - are all forms of red...)

Asagi (ah-sah-gee) - koi with a blue back, some red on its "cheeks," pectoral fins, and flanks

Beni (ben-ee) - a deep solid red

Budo (boo-doh) - grape, purple

Cha (chah) - brown, tea

Doitsu (dwah-tsoo) - scaleless, or row of large scales. Can be on any breed of Koi

Gin (gen) - silver

Gin-rin (gen-rin) - diamond scales with a sparkly silver deposit on them.

Godan (go-dan) - five-step pattern

Goshiki (go-she-key) - a five colored koi - white, red, black, dark blue, and light blue

Hajiro (hah-jeer-oh) - a black koi with a white nose, and white at the tips of its fins

Hariwake (hair-a-walk-e) - a platinum koi with orange, yellow, or gold markings

Hi (he) - general term for red

Hikari (hee-kah-ree) - shiny, metallic luster

Kage (kah-gay) - shadow, undeveloped black

Karasu  (kah-rah-soo) - means "crow." A term used to describe a completely black koi.

Ki (kee) - yellow

Kin (ken) - golden

Kiwa (kee-wah) - the edges of the patten on a koi

Kohaku (koh-hah-koo) - a white koi with red markings

Koi (coy) - fancy colored Japanese carp

Koi kichi (coy-kee-chee) - literally means a person who is "koi crazy"

Koromo (koh-roh-moh) - red color on the fish is overlaid with blue or black edging.

Kuchieni (koo-chee-ben-ee) - "lipstick"  fish with red markings on its lips - giving it the
appearance of wearing lipstick.

Kumonryu (koo-mohn-roo) - black doitsu koi with a bit of white on its head, fins, and body.

Magoi (mah-goy) - a wild type of black carp, an ancestor of the modern koi

Matsuba (ma-tsue-bah) - net-like pattern on scales

Mesu (me-soo) - female

Midori (me-dohr-e) -green

Motoguro (moh-toh-gur-oh) - the black markings on the base of the pectoral fins

Nindan (nee-dan) - two distinct markings, two-step pattern.

Nisai (nee-sigh) - two-year old koi

Ochiba (oh-chee-buh) - a grayish koi with a brown pattern

Ogon (o-gone) - a shiny koi of a single color

Orenji (ohr-in-jee) - orange

Osu (oh-soo) - male koi

Rin (ren) - scales

Sandan (san-dawn) - three distinct markings, three-step pattern

Sanke (sahn-kee) - white koi with red and black markings

Sansai (san-sigh) - three-year old koi

Shiro (sheer-o) - white

Shiro utsuri (sheer-o-oot-sir-ee) - black koi with white markings.

Showa (sho-wah) - black koi with red and white markings

Shusui (shoo-swee) - an asagi without scales

Sumi (soo-mee) - black

Tancho (tahn-choh)- a koi with a single red circular spot on its head

Tategoi (tah-tay-goy) - a young koi with potential for excellent future development.

Tosai (toe-sigh) - koi less than one-year old

Utsuri (oot-sir-ee) - reflection

Yamabuki (yah-mah-boo-kee) - yellow

Yondan (yon-dawn) - four distince markings, four-step pattern