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Improved medaka with deep emerald green body reminiscent of jade. Green medaka are rare, with unique coloration popular among collectors. Color shifts with light angle.
Hisui (jade) medaka is an improved variety whose deep emerald-green body recalls the gemstone jade. Green-toned medaka are relatively rare, and their calm, distinctive coloration is prized by collectors. The hue shifts subtly with light angle, changing expression by setting. Standard body type, roughly 3–4 cm. Stabilizing the green requires selecting strongly colored parents. Hardy across roughly 5–30°C in neutral to slightly alkaline water. Color shows best in dark containers under bright natural or LED light, suiting top-view observation and outdoor keeping. Peaceful and community-compatible with similar-sized gentle varieties. Keeping is no harder than other improved medaka, but experience helps in selective breeding to maintain and deepen the green.
Origin
Japan (selectively bred variety)
Lifespan
2-3 years
Size
3-4cm
Temperature
5〜30℃(適温20〜28℃)
Medaka pellets, daphnia, brine shrimp
White container beautifully showcases green color
Color fades with poor water quality. Regular changes needed
Sources: FishBase: Oryzias latipes / Seriously Fish: Oryzias latipes
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。
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.
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.
Accepted name: (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.
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Strictly select deepest green individuals for breeding
Some strains have low green fixation rate. Check parent coloring
Intermediate. This is an intermediate-level species. Some prior experience and knowledge of environmental management are recommended.
The ideal temperature for Hisui (Jade) Medaka is 5〜30℃(適温20〜28℃). Avoid sudden temperature changes and maintain a stable environment.
The average lifespan of Hisui (Jade) Medaka is 2-3 years. With proper care and nutrition, they can live a long and healthy life.
Hisui (Jade) Medaka typically reaches 3-4cm as an adult. Size may vary depending on care conditions and individual genetics.
Hisui (Jade) Medaka feeds on: Medaka pellets, daphnia, brine shrimp. Aim for a balanced diet with appropriate feeding frequency.
The price of Hisui (Jade) Medaka varies significantly depending on morph, size, and lineage. Check our market price page for the latest pricing information.
Last updated: July 8, 2026