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Kuro Miyuki (Black Miyuki) Medaka
IntermediateOryzias latipes
An improved medaka carrying the miyuki external luminescence on a black body. Where the sheen is bluish-white on white and blue fish, on a black body it reads as gold or deep blue. The fish shows background adaptation, so body colour darkens or lightens with the container.
Difficulty
Intermediate
Temperature
18〜28℃
Size
Up to about 4cm SL
Diet
Prepared medaka food, green water
About
Kuro Miyuki is an improved medaka combining a black body with external luminescence; its classification name is the black external-luminescence medaka. It was created in 2014 by Masahiro Amano and is registered in the Medaka Web Encyclopedia as type No.0113 and variety No.0102, also circulating under the name Kiwami Black. The encyclopedia describes it as the first medaka to carry external luminescence on a body colour other than white or blue. Moving onto a black body changes the colour of the sheen itself: on blue and white fish it is bluish-white, but on a black body it reads as gold or deep blue. External luminescence derives from the miyuki variety discovered in 2007 by Takashi Suga, spreading from near the dorsal fin toward the head. Black body colour shows background adaptation, so the colour fades in a pale container and tightens in a dark one, sharpening the contrast with the sheen. The encyclopedia also registers derivatives carrying hirenaga long fins or the daruma body type as separate varieties.
Source: Wikipedia (CC BY-SA 4.0)
Size of the Kuro Miyuki (Black Miyuki) Medaka
The Kuro Miyuki (Black Miyuki) Medaka grows to Up to about 4cm SL.
Temperature & humidity for the Kuro Miyuki (Black Miyuki) Medaka
The ideal temperature for the Kuro Miyuki (Black Miyuki) Medaka is 18〜28℃.
Basic Info
Origin
Japan (domestic variety created in 2014 by Masahiro Amano)
Size
Up to about 4cm SL
Temperature
Care Specifications
- pH
- 7–8
- Hardness (GH)
- 9–19 dGH
- Water Temp.
- 18–28℃
PeacefulGroupBreeding: Moderate
Sources: Medaka Web Encyclopedia: Complete Medaka Care Guide / FishBase Oryzias latipes / Medaka Web Encyclopedia No.0113
Morphs (Varieties)
The Japan Medaka Association classification manual deliberately classifies varieties by visually identifiable traits rather than by genotype, and does not define modes of inheritance for individual traits. Inheritance is recorded here as line-bred only for traits the manual explicitly states can be fixed by selective breeding; it is left blank otherwise.
Other
Black body colour (with background adaptation)External luminescence (taigaikou)
Sources: Japan Medaka Association: Variety Classification Manual, 5th ed. (Sep 2025) / Medaka Web Encyclopedia: Medaka Traits / Medaka Web Encyclopedia No.0113
A curated selection of notable morphs. Inheritance modes are a breeding-planning guide; actual appearance varies with combos.
References & Sources
Edited & verified by: BreederDirect editorial team
The taxonomic, regulatory, and husbandry data on this page are compiled and verified against the authoritative primary sources below.
Primary sources
- Wikipedia
- CITES Appendices (species not listed)
- FishBase (IUCN Red List: Least Concern, assessed 2018)
- Medaka Web Encyclopedia: Complete Medaka Care Guide
- Medaka Web Encyclopedia No.0113
- Japan Medaka Association: Variety Classification Manual, 5th ed. (Sep 2025)
- Medaka Web Encyclopedia: Medaka Traits
- FishBase
- GBIF
Taxonomy & Authority
Accepted name: Oryzias latipes (Temminck & Schlegel, 1846)
Breeder: 天野雅弘 (2014)
Authority databases: FishBase · GBIF · Medaka Web Encyclopedia No.0113
Nomenclature follows global taxonomic authority databases.
Regulations & Conservation Status
Not CITES-listedIUCN LC · Least Concern
Sources: CITES Appendices (species not listed) / FishBase (IUCN Red List: Least Concern, assessed 2018)
Regulations may change. Always verify the latest information with the relevant authorities.
Kuro Miyuki (Black Miyuki) Medaka Listings
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