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Oryzias latipes
An improved medaka carrying white and vermilion with both mottling and external luminescence. The combination of a tricolour pattern with the miyuki sheen is its hallmark; the fixation rate is low and fish showing both features well are hard to produce. Created by Seirakuan in 2018, it also circulates as tricolour miyuki.
Tricolour taigaikou is an improved medaka carrying white and vermilion together with external luminescence and mottling; its classification name is the white-vermilion external-luminescence mottled medaka. The Medaka Web Encyclopedia registers it as type No.0172 and variety No.0160, created in 2018 by Seirakuan, and it also circulates as tricolour miyuki. Laying the miyuki sheen over a tricolour pattern is described as an expression only improved medaka can offer, but the fixation rate is low and fish showing both the tricolour pattern and the luminescence well are difficult to produce, so it is considered a variety for experienced keepers. External luminescence derives from miyuki: a bluish-white light spreads from near the dorsal fin toward the head, drawing a line along the back. Mottling is a pattern trait of black patches whose positions vary between fish. The encyclopedia cites Medaka Hinshu Zukan II by Fumitoshi Mori (2020) and refers readers to the site of the breeder, Seirakuan, which publishes a family tree of the lame miyuki series from the appearance of aurora miyuki.
Source: Wikipedia (CC BY-SA 4.0)
The Tricolor Taigaikou Medaka lives 2-3 years.
The Tricolor Taigaikou Medaka grows to Up to about 4cm SL.
The ideal temperature for the Tricolor Taigaikou Medaka is 18〜28℃.
Origin
Japan (a domestic variety created in 2018 by Seirakuan)
Sources: Medaka Web Encyclopedia: Complete Medaka Care Guide / FishBase Oryzias latipes / Medaka Web Encyclopedia No.0172 (Tricolour taigaikou)
The Japan Medaka Association's classification manual sorts varieties by traits that can be seen rather than by genotype, and does not set out how individual traits are inherited. Traits the manual explicitly says can be passed on and produced by selective, multi-generation breeding are listed as line-bred; the rest are grouped under Other.
Sources: Japan Medaka Association: Variety Classification Manual, 5th ed. (Sep 2025) / Medaka Web Encyclopedia: Medaka Traits / Medaka Web Encyclopedia No.0172 (Tricolour taigaikou) / Medaka Web Encyclopedia: External luminescence
A curated selection of notable morphs. Inheritance modes are a breeding-planning guide; actual appearance varies with combos.
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.
Primary sources
Accepted name: Oryzias latipes (Temminck & Schlegel, 1846)
Breeder: 静楽庵 (2018)
Authority databases: FishBase · GBIF · Medaka Web Encyclopedia No.0172 (Tricolour taigaikou) · Seirakuan: How the lame miyuki series was bred
Nomenclature follows global taxonomic authority databases.
Sources: CITES Appendices (species not listed) / FishBase (IUCN Red List: Least Concern, assessed 2018)
Regulations may change. Always verify the latest information with the relevant authorities.
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Lifespan
2-3 years
Size
Up to about 4cm SL
Temperature
18〜28℃
Prepared medaka food, green water
External luminescence appears on the back and the tricolour pattern is read from the dorsal side, so the variety suits viewing and selection from above. The Medaka Web Encyclopedia recommends outdoor keeping and suggests shading half the container in summer.
Commercial prepared medaka food is the staple, given in an amount finished within a few minutes. Leftovers decay and foul the water, so adjust the quantity. Green water rich in phytoplankton suits fry rearing.
Slightly acidic to slightly alkaline water is considered ideal, and the water drifts toward acidic as keeping continues. Around one water change per week is the guideline, and because sudden shifts in temperature or pH cause stress, acclimatise new fish by floating the bag. FishBase records the wild water chemistry of this species as pH 7.0-8.0 and hardness 9-19 dH.
A peaceful schooling fish, normally kept as a group of the same variety. One litre of water per fish is the guideline against overcrowding; overstocking causes poor growth, reduced breeding, oxygen shortage and water fouling.
Outdoors the spawning season runs from about April to October, once water reaches 18C or above with 12-13 hours of daylight. For year-round indoor breeding, 25-28C water and over 13 hours of lighting are the guideline. Eggs hatch at a cumulative 250 degree-days, about 10 days at 25C.
The fixation rate is low and few fish show both the tricolour pattern and the luminescence well, so selection requires numbers. The further the light runs toward the head the better it is rated, and pattern and light must be judged together.
Advanced. This is an advanced-level species. It requires specialized equipment and advanced husbandry skills with precise environmental control.
The ideal temperature for Tricolor Taigaikou Medaka is 18〜28℃. Avoid sudden temperature changes and maintain a stable environment.
The average lifespan of Tricolor Taigaikou Medaka is 2-3 years. With proper care and nutrition, they can live a long and healthy life.
Tricolor Taigaikou Medaka typically reaches Up to about 4cm SL as an adult. Size may vary depending on care conditions and individual genetics.
Tricolor Taigaikou Medaka feeds on: Prepared medaka food, green water. Aim for a balanced diet with appropriate feeding frequency.
The price of Tricolor Taigaikou Medaka varies significantly depending on morph, size, and lineage. Check our market price page for the latest pricing information.
Last updated: September 17, 2026