Morpho Medaka
IntermediateOryzias latipes
An albino white medaka with large fins glowing blue from morpho fin shine, ruby eyes and real long-fin rays. Created by Toshihiro Wada in 2024.
Aquamarine is the nickname of a white ruby-eye body-shine morpho real long-fin medaka; the Kairyo Medaka Web Zukan credits it to Toshihiro Wada, 2024. It was bred from Topaz (a grape-eyed albino platinum miyuki real long-fin) and Rêve. Its white albino-type body and dark red ruby eyes combine with large fins that glow blue from morpho fin shine; some fish also show strong guanine shine on the flanks from platinum miyuki. The name refers to the guppy variety Topaz, formally 'Real Red Eye Albino Aquamarine Neon Tuxedo', and to the pale blue gemstone. Its parent Rêve has a blue body and dark eyes, so body and eye colour tell them apart.
Source: Wikipedia (CC BY-SA 4.0)
The Aquamarine Medaka grows to About 3-4 cm (wild medaka reach up to 4 cm SL: FishBase).
Origin
Japan (ornamental cultivar)
Lifespan
Few reliable data
Size
About 3-4 cm (wild medaka reach up to 4 cm SL: FishBase)
Temperature
5〜30℃
Omnivore (floating prepared foods, live foods such as daphnia)
Edited & verified by: BreederDirect editorial team
The taxonomic, regulatory, and husbandry data on this page are compiled and verified against the authoritative primary sources below.
Accepted name: Oryzias latipes (Temminck & Schlegel, 1846)
Synonyms: Aplocheilus latipes (Temminck & Schlegel, 1846), Poecilia latipes Temminck & Schlegel, 1846
Authority databases: GBIF · GBIF · 日本メダカ協会 品種分類マニュアル
Nomenclature follows global taxonomic authority databases.
Ornamental medaka are cultivars of Oryzias latipes. Not listed in the CITES Appendices (checked on Species+) and not regulated under Japan's Invasive Alien Species Act. Japan's wild medaka (Oryzias latipes and O. sakaizumii) are listed as Vulnerable on the Ministry of the Environment Red List and differ genetically by region. Releasing ornamental medaka into rivers, ponds or rice paddies causes genetic pollution through hybridisation with wild fish, so never release them.
Sources: Species+ (CITES) / Ministry of the Environment: list of invasive alien species / Wikipedia (Japanese): Medaka – conservation and genetic pollution
Regulations may change. Always verify the latest information with the relevant authorities.
Find listings for this species
The blue-glowing fins look best from the side in a glass tank; avoid sharp décor and strong currents.
A new 2024 variety whose siblings vary; choose breeders combining ruby eyes, long fins and fin shine.
Peaceful and fine with other medaka of similar size. To keep the variety's traits, do not let it breed with other varieties in the same container.
Give floating food that is eaten within 3-5 minutes: at least twice a day in summer, once a day in spring and autumn, and little or none outdoors in winter.
Never release ornamental medaka into rivers, ponds or paddies; hybridisation causes genetic pollution of wild medaka.
Intermediate. This is an intermediate-level species. Some prior experience and knowledge of environmental management are recommended.
Aquamarine Medaka typically reaches About 3-4 cm (wild medaka reach up to 4 cm SL: FishBase) as an adult. Size may vary depending on care conditions and individual genetics.
Aquamarine Medaka feeds on: Omnivore (floating prepared foods, live foods such as daphnia). Aim for a balanced diet with appropriate feeding frequency.
The price of Aquamarine Medaka varies significantly depending on morph, size, and lineage. Check our market price page for the latest pricing information.
Last updated: September 28, 2026
