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Youkihi Hikari Medaka
BeginnerOryzias latipes var.
Hikari body type of Youkihi Medaka. Silvery-white glow on the back combined with vivid orange-red coloration. Stunning when viewed from above.
Difficulty
Beginner
Temperature
5〜30℃
Lifespan
1-3 years
Size
3-4cm
Diet
Medaka pellets, daphnia, brine shrimp
About
Youkihi Hikari medaka combines the classic improved variety Youkihi with the hikari body type (symmetrical dorsal and anal fins, broad caudal fin). Vivid orange-red body color combined with silver-white external dorsal light creates spectacular beauty in top-view observation. Hikari body type is highly heritable. Color-enhancing carotenoid food maintains the vermilion color, deepened further by outdoor sunlight. Hardy in 5–30°C, neutral to slightly alkaline water. Shallow top-viewing containers best showcase the combination of vermilion body and external light. Popular as a variety that combines Youkihi's beauty with the added brilliance of the hikari trait.
Basic Info
Origin
Japan (selectively bred variety)
Lifespan
1-3 years
Size
3-4cm
Temperature
5〜30℃
Diet
Medaka pellets, daphnia, brine shrimp
Care Guide
Container
Dark top-viewing container shows red and external light
Sunlight
Outdoor keeping deepens body color
Temperature
5-30°C (optimal 20-28°C)
Care Specifications
- pH
- 7–8
- Hardness (GH)
- 9–19 dGH
- Water Temp.
- 18–24℃
PeacefulGroupBreeding: Easy
Sources: FishBase: Oryzias latipes / Seriously Fish: Oryzias latipes
Morphs (Varieties)
改良メダカは体型×体色×柄×光(体内/体外)×鱗(透明鱗)×ラメ×ヒレ等のトレイト合成。掲載は当該品種を構成する確証トレイトのみで遺伝形式は確証のみ付与(不確実は省略)。遺伝形式は交配の参考。
RecessiveVisual only with two copies; one copy = het (carrier).
Orange-red (hi) bodyHikari body
PolygenicContinuous trait from multiple genes; intensified by selective breeding.
Body luster (taikougai)
Sources: JMA日本メダカ協会 改良メダカ品種分類マニュアル / 改良メダカWEB図鑑(medakazukan)
A curated selection of notable morphs. Inheritance modes are a breeding-planning guide; actual appearance varies with combos.
References & Sources
Edited & verified by: br-choku 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 · 日本メダカ協会 品種分類マニュアル
Nomenclature follows global taxonomic authority databases.
Youkihi Hikari Medaka Listings
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