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Ginga Medaka
IntermediateOryzias latipes var.
Improved medaka with beautiful blue external body light. Named because the blue-white external light emanating from the back evokes a galaxy. Popular variety with fantastical beauty like a nighttime water surface.
Difficulty
Intermediate
Temperature
5〜30℃
Lifespan
2-3 years
Size
3-4cm
Diet
Medaka pellets, daphnia
About
Ginga (Galaxy) medaka is an improved variety whose blue-white external body light emanating from the back evokes a galaxy. Based on Miyuki external body light, combining wide-coverage external light across the body with lame creates a fantastical galaxy-like shimmer. The external body light is especially beautiful under LED lighting and in dark containers, where the galaxy-like light band stands out most. Adult size 2–4cm, standard body type. Selecting parents with the widest external light coverage is paramount in selective breeding. High ornamental value from both top and side views.
Lifespan of the Ginga Medaka
The Ginga Medaka lives 2-3 years.
Size of the Ginga Medaka
The Ginga Medaka grows to 3-4cm.
Temperature & humidity for the Ginga Medaka
The ideal temperature for the Ginga Medaka is 20〜28℃.
Water temperature management around 28°C during the juvenile stage is critical for external light development. Hardy in 5–30°C, neutral to slightly alkaline water; intermediate-to-advanced skill required for quality individual production.
Basic Info
Origin
Japan (selectively bred variety)
Lifespan
2-3 years
Size
3-4cm
Care Specifications
- pH
- 7–8
- Hardness (GH)
- 9–19 dGH
- Water Temp.
- 20–28℃
PeacefulGroupBreeding: Easy
Sources: FishBase: Oryzias latipes / Seriously Fish: Oryzias latipes
Morphs (Varieties)
Selectively bred killifish are trait combinations of body form × body color × pattern × luminescence (internal/external) × scale types (transparent scales) × sparkle × fin morphology and so forth. Published entries include only confirmed traits constituting the given variety, with genetic inheritance patterns provided only for confirmed traits (uncertain cases omitted). Genetic patterns are provided as reference for breeding.
PolygenicContinuous trait from multiple genes; intensified by selective breeding.
Body luster (taikougai)
Other
Blue body
Sources: JMA Japan Medaka Association — Improved Medaka Variety Classification Manual (JA) / Improved Medaka Web Encyclopedia (medakazukan, JA)
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.
Taxonomy & Authority
Accepted name: Oryzias latipes var. (Temminck & Schlegel, 1846)
Synonyms: Aplocheilus latipes (Temminck & Schlegel, 1846), Poecilia latipes Temminck & Schlegel, 1846, Oryzias latipes latipes (Temminck & Schlegel, 1846)
Authority databases: FishBase · GBIF · Japan Medaka Association — Variety Classification Manual (JA)
Nomenclature follows global taxonomic authority databases.
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