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A fantastical medaka reminiscent of a night sky galaxy. Beautiful combination of glitter and multiple colors.
Galaxy medaka is a fantastical improved variety with multicolor lame scattered across the body like a cosmic galaxy. Blue, white, gold, pink, and other lame colors scattered over the body evoke nebulae and galaxies of the universe. Fixation rate for multicolor lame is low — mass breeding and rigorous selection are needed to produce individuals with ideal color distribution and density. LED lighting showcases each colored lame at its most brilliant. Hardy in 5–30°C, neutral to slightly alkaline water. Dark containers under LED lighting best express the galaxy aesthetic. Selecting parents with the most colors and highest lame density maximizes multicolor expression in offspring.
Origin
Japan (selectively bred variety)
Lifespan
2-4 years
Size
2-4cm
Temperature
5〜30℃(適温20〜28℃)
Artificial feed, Daphnia
多色ラメの固定率は低く選別が重要
LEDライトで鑑賞すると美しい
水温変化を最小限に抑える
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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少数精鋭での繁殖が望ましい
ストレスで体色が変化しやすい
Advanced. This is an advanced-level species. It requires specialized equipment and advanced husbandry skills with precise environmental control.
The ideal temperature for Galaxy Medaka is 5〜30℃(適温20〜28℃). Avoid sudden temperature changes and maintain a stable environment.
The average lifespan of Galaxy Medaka is 2-4 years. With proper care and nutrition, they can live a long and healthy life.
Galaxy Medaka typically reaches 2-4cm as an adult. Size may vary depending on care conditions and individual genetics.
Galaxy Medaka feeds on: Artificial feed, Daphnia. Aim for a balanced diet with appropriate feeding frequency.
The price of Galaxy Medaka varies significantly depending on morph, size, and lineage. Check our market price page for the latest pricing information.
Last updated: July 8, 2026