
AI-generated image
A fantastic medaka emitting pale light like moonlight. Internal light shines from head to back.
Moonlight medaka is a fantastical improved variety emitting a soft, pale glow like moonlight. Body color ranges from white to pale cream or light blue, with external body light or semi-translucent body texture creating a mystical lunar shimmer. Many strains carry Miyuki external body light, with pale inner light from head to back being the main attraction. Dark containers (black) best evoke a moonlit atmosphere by making the light stand out. Hardy in 5–30°C, neutral to slightly alkaline water. Regular water changes maintain water quality. External-light range selection in breeding maintains strong-light lineages. Particularly beautiful under LED lighting in indoor aquariums.
Origin
Japan (selectively bred variety)
Lifespan
2-3 years
Size
3-4cm
Temperature
5〜30℃(適温20〜28℃)
Pellets, Daphnia
Light shows well against dark background
Neutral to slightly alkaline
High-quality feed enhances internal light
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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Internal light intensity varies by individual
Intermediate. This is an intermediate-level species. Some prior experience and knowledge of environmental management are recommended.
The ideal temperature for Moonlight Medaka is 5〜30℃(適温20〜28℃). Avoid sudden temperature changes and maintain a stable environment.
The average lifespan of Moonlight Medaka is 2-3 years. With proper care and nutrition, they can live a long and healthy life.
Moonlight Medaka typically reaches 3-4cm as an adult. Size may vary depending on care conditions and individual genetics.
Moonlight Medaka feeds on: Pellets, Daphnia. Aim for a balanced diet with appropriate feeding frequency.
The price of Moonlight Medaka varies significantly depending on morph, size, and lineage. Check our market price page for the latest pricing information.
Last updated: July 8, 2026