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Ao Hikari Medaka
BeginnerOryzias latipes
Blue body color combined with hikari body type. Bluish body with silvery-blue external light creates cool and fantastical beauty. Especially beautiful in outdoor sunlight.
Difficulty
Beginner
Temperature
5〜30℃
Lifespan
2-3 years
Size
3-4cm
Diet
Medaka pellets, daphnia
About
Ao Hikari medaka combines blue body color with the hikari body type (symmetrical dorsal and anal fins, broad caudal fin). Blue-tinted body color combined with silver-blue external dorsal light creates a cool, fantastical shimmer. Many strains derive from Marine Blue and Miyuki crosses, where external light and body blue synergize in beauty. Top-view observation shows the light band crossing the blue body, evoking a clear summer sky. Especially beautiful under outdoor sunlight. Hikari body type is highly heritable; external-light-range selection in breeding improves quality. Easy to keep and breed — a popular entry point into blue medaka varieties.
Lifespan of the Ao Hikari Medaka
The Ao Hikari Medaka lives 2-3 years.
Size of the Ao Hikari Medaka
The Ao Hikari Medaka grows to 3-4cm.
Temperature & humidity for the Ao Hikari Medaka
The ideal temperature for the Ao Hikari Medaka is 20〜28℃.
Extremely hardy in 5–30°C, neutral to slightly alkaline water.
Basic Info
Origin
Japan (selectively bred variety)
Lifespan
2-3 years
Size
3-4cm
Temperature
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.
RecessiveVisual only with two copies; one copy = het (carrier).
Hikari body
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 (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.
Regulations & Conservation Status
Not CITES-listed
Oryzias latipes. Not listed in the CITES Appendices (checked on Species+, 2026-09-18).
Sources: Species+ (CITES)
Regulations may change. Always verify the latest information with the relevant authorities.
Ao Hikari Medaka Listings
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