
AI-generated image
A medaka with powerful scale shine reminiscent of a dragon. Iron mask type head gloss is particularly beautiful.
Dragon medaka is an improved variety with especially strong Miyuki-lineage external body light covering the body like dragon scales. The 'iron mask' type — where metallic sheen covers the entire head — is particularly prized, and the light develops noticeably as the fish matures. Maintaining water temperature around 28°C from the juvenile stage promotes maximum external light development. White containers allow easy inspection of light coverage extent; dark containers make the light stand out most for viewing. Hardy in 5–30°C. Selective breeding of wide-coverage individuals maintains strong-light lineages. Considered among the finest Miyuki-lineage varieties.
Origin
Japan (selectively bred variety)
Lifespan
2-4 years
Size
2-4cm
Temperature
5〜30℃(適温20〜28℃)
Artificial feed, Daphnia
鉄仮面の光沢は成長とともに強くなる
体外光を伸ばすには白容器が効果的
水温28℃前後で体外光が伸びやすい
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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幼魚期の環境が成魚の光に影響する
選別で光の質を向上させる
Intermediate. This is an intermediate-level species. Some prior experience and knowledge of environmental management are recommended.
The ideal temperature for Dragon Medaka is 5〜30℃(適温20〜28℃). Avoid sudden temperature changes and maintain a stable environment.
The average lifespan of Dragon Medaka is 2-4 years. With proper care and nutrition, they can live a long and healthy life.
Dragon Medaka typically reaches 2-4cm as an adult. Size may vary depending on care conditions and individual genetics.
Dragon Medaka feeds on: Artificial feed, Daphnia. Aim for a balanced diet with appropriate feeding frequency.
The price of Dragon Medaka varies significantly depending on morph, size, and lineage. Check our market price page for the latest pricing information.
Last updated: July 8, 2026