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Oryzias latipes
An improved medaka expressing a soft pink through leucophores developed over a vermilion base. It is one of the recognised body-colour classes, told apart from white by fin colour.
Pink Medaka is one of the recognised body-colour classes, registered in the Medaka Web Encyclopedia as type No.0031, variety No.0029 and fixed variety No.0133. That source explains that the vivid pink is produced when the ci gene, which develops leucophores, acts on a vermilion base. Some white-bodied fish also look faintly pink but are a different thing, and the clearest difference lies in the fins: pink fish have fins the same colour as the body or close to vermilion, white fish carry no colour in the fins, and cream fish have yellow fins, so the fins rather than the body settle the identification. A work cited by the Japan Medaka Association classification manual states that the pale pink body usually results from a gene suppressing the development of xanthophores over a vermilion base, with shades varying from pink to yellow-orange between the sexes. Neither the breeder nor the year of creation is recorded.
Source: Wikipedia (CC BY-SA 4.0)
The Pink Medaka lives 2-3 years.
The Pink Medaka grows to Up to about 4cm SL.
The ideal temperature for the Pink Medaka is 18〜28℃.
Origin
Japan (breeder and year unknown; the parent species ranges across Japan, Korea, China and Vietnam)
Lifespan
Sources: Medaka Web Encyclopedia: Complete Medaka Care Guide / FishBase Oryzias latipes / Medaka Web Encyclopedia No.0031
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.0031
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)
Authority databases: FishBase · GBIF · Medaka Web Encyclopedia No.0031 · Medaka Web Encyclopedia: Fixed Variety Number List
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.
Find listings for this species
2-3 years
Size
Up to about 4cm SL
Temperature
18〜28℃
Prepared medaka food, green water
The soft body colour reads deeper when viewed from above in a dark container and washes out in a pale one. Outdoors, guard against summer overheating from direct sun.
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.
Body colour alone is easily confused with white, so use fin colour to identify the variety. Outdoors the fish become inactive and overwinter near the bottom as water cools, resuming activity in spring once daytime water exceeds 10C. A 0.3-0.5% salt bath is used for ailing fish, with water raised to no more than about 28C.
Beginner. This is a beginner-friendly species. No special equipment or experience is required, and it can be kept successfully with basic care setup.
The ideal temperature for Pink Medaka is 18〜28℃. Avoid sudden temperature changes and maintain a stable environment.
The average lifespan of Pink Medaka is 2-3 years. With proper care and nutrition, they can live a long and healthy life.
Pink Medaka typically reaches Up to about 4cm SL as an adult. Size may vary depending on care conditions and individual genetics.
Pink Medaka feeds on: Prepared medaka food, green water. Aim for a balanced diet with appropriate feeding frequency.
The price of Pink Medaka varies significantly depending on morph, size, and lineage. Check our market price page for the latest pricing information.
Last updated: September 17, 2026