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Nishikigoi Terms





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This Glossary is Koi, Plant and all things relating to the Pond.


Pronunciation Guide:

A - pronounced ah, as in paw or draw EI - pronounced aye, as in bay, play
E - pronounced eh, as in spend or friend OI - pronounced oye, as in toy, boy
I - pronounced ee, as in bee, he, tree OA - pronounced oh ah, as in boa
O- pronounced oh, as in tow, oak OO - pronounced oo, as in who, boo
U - pronounced uu, as in moo, who UI - pronounced wee, as in tree, bee
R - sometimes pronounced like the letter "d" JI - pronounced gee, as in bungi
AI - pronounced eye, as in pie, fly JY - pronounced jah, as in draw, jaw
AO - pronounced ah oh RYU - pronounced droo, as in Andrew



Word(Pronunciation)Meaning
Obachi(oh bah' chee)Tail section. A specific term for Ozutsu. It specifies the top section of the Ozutsu, not the sides or the bottom. The tail section is a very important part for Koi, and thus, there are many special terms.
Obi Zumi (oh bee' zoo' mee)Belt Sumi. A shape of Sumi that is thin, long and square like an Obi (belt). Several Sumi patches usually connect to create the pattern. Used mainly to describe the Sumi in Taisho Sanshoku (Sanke). The pattern must cross the backbone and look like an Obi. It would be perpendicular to Tate Zumi.
Ochibashigure (oh' chee bah she goo reh')Gray markings on either a brown , yellow or green koi.
Odome(oh doe' meh)Line between the last color and Shiroji in the tail section. Odome is the way the pattern appears as it stops or finishes in the tail section. A good Odome must create a clear line and leave white showing. The pattern in the tail section must consist of both Hi and Shiroji in Kohaku, and Hi, Shiroji and Sumi for both Taisho Sanshoku (Sanke) and Showa. When the tail section ends with adequate Shiroji before the fin (especially in Gosanke), we say that the "Odome is good." When the Shiroji is too wide or when only Hi or Sumi reach the tail, we say that the "Odome is bad."
Odome Hi (oh doe' meh he')Red pattern on the tail section.
Odome Zumi (oh doe' meh zoo' me)Sumi on the tail section.
Ogon(oh' gone)koi fish pictures Means the variety of metallic-gold scaled Koi (yamabuki ogon).
Oh Zumi(oh' zoo' mee)Relatively large Sumi on the body. Also called Doka Zumi.
OjimeDistance between the last dan and the tail.
Ojiya City(oh gee' yah)The birthplace in Niigata of Nishikigoi.
Okute(oh coo' the)Late bloomer.
Omoyo Refers to a single-stepped Kohaku, i.e., a koi with just a single patch over its white body.
Oni Uroko (oh ni' oo row koh)The large, dark-blue scales running down the back of Shusui.
Opercular Cavity Space immediately behind the gills and covered by the opercular plate or flap which can be seen to move as the fish respires.
Operculum The bony plate that covers the gills.
Orenji Orange
Orenji Hariwake A silver koi with metallic orange markings.
Orenji Ogon A deep orange metallic koi.
Organ Somewhat independent body part that performs a specialized function, e.g. pancreas.
Organic Chemical substances containing carbon. As apposed to inorganic.
Osmosis Movement of a solvent through a semipermeable membrane from a solution of lower to higher concentration of the solutes.
Osu Male
Otomo(oh tow' mow)Companion. Often used to describe free Nishikigoi that are included along with the purchase of an excellent quality Nishikigoi.
Ovum Female reproductive or germ cell that is capable after fertilization of developing into a new organism of the same species.
Oxidation When a chemical substance combines with oxygen.
Oyabone (oh yah' bow neh)The tickest bone of the pectoral fin, dorsal fin and tail fin. The bone of each fin that is closest to the head. Ideally, it should be white. When it has some color, we say that the "Oyabone is disgraced."
Oyagoi Parents used for breeding
Oyugu Hoseki (oh YOO goo hoh SEH kee) Literally means "living jewels," an affectionate name for Koi.
Ozuke Hi (oh' zoo keh hee)Hi at the very base of the tail fin. Not desirable.
Ozutsu(oh zoi t-sue)Tail section. This term is used for the part of the body located from the end of the dorsal fin to the root of the tail. It is an important section because it contains the Odome. In addition, Nishikigoi with thick Ozutsu look powerful; while Koi with thin Ozutsu look feeble. If a Koi has a thick Ozutsu while it is young, it may have the potential to grow in to a Jumbo Koi. Obachi specifies the top section of the Ozutsu, not the sides or the bottom.


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