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AQUAPEDIA / SOURCE-LINKED RESEARCH

Ouka (Joshu Medaka)

王華

Historically documented Japanese Medaka varietyEvidence by claimIndependent review ongoing

Vermilion red-white body with dense reflective lame along the back.

Picture gene & lineage tree

Visual pedigree of breeder-reported inputs, where available. Dashed arrows represent documentary claims or selection history, not DNA-tested genes.

Horizontal branching Medaka lineage. American name: Ouka (Joshu Medaka); Japanese romaji: not verified; Japanese characters: 王華. Dashed connectors show breeder-reported input or selection history; they do not prove genetic parentage. Documented source links and evidence qualifiers follow the diagram.AQUAPEDIA / MEDAKA LINEAGE ATLASSTRAIN PEDIGREEREPORTED LINEAGEDASHED BRANCHES • REPORTED INPUTS / SELECTION STAGESNot an individual-fish pedigree or DNA / dominance test.REPORTED INPUT / STAGE 1Tricolor Lame × Tricolor Exterior Light(foundation)REPORTED INPUT / STAGE 2Red-White Lame (later input)FOCAL STRAINAMERICAN / ENGLISH NAMEOuka (Joshu Medaka)JAPANESE NAME (ROMAJI)Not verifiedJAPANESE LETTERS (日本語)王華
Dashed connectors show breeder-reported input or selection history; they do not prove genetic parentage. Not a confirmed genotype or parent-fish identification.

Multi-stage reported crossing, not a single mating Source: Medaka WEB Zukan No.0896 — Joshu Medaka reported selection history

Browse the larger Medaka lineage atlas ↗

View this strain’s illustrated gene tree in Discord ↗

Lineage review · Batch 015: Breeder-reported ancestry/selection stages have been added to the illustrated tree; these are documentary descriptions, not molecular inheritance results. Specialist source ↗

Overview

The source reports a staged tricolor-lame and exterior-light selection program followed by red-white lame input. Creator identity and lineage are limited to this cited specialist account.

Claim-by-claim evidence

Research findingEvidence classDirect references
The specialist identifies Takuya Okada / 岡田卓也 in the maker field; creation-year statement: 2020.Historically documented specialist attribution, breeder confirmation pendingo ↗
Vermilion red-white body with dense reflective lame along the backPublished visible-characteristic description, not a DNA assayo ↗
The source reports a staged tricolor-lame and exterior-light selection program followed by red-white lame inputSource historical-selection account, independently unchecked crossing logo ↗
Successive breeding inputs must not be treated as one simultaneous multi-parent matingIdentity/date/genetics limitation preserved rather than inferredo ↗

Evidence labels refer to documentary strength. They do not assert independently tested genetics.

Known research gaps

  • No complete original breeder parent-fish ledger or independent molecular genotype assay has been reviewed.
  • The listed creator/year do not authenticate present-day retail stock or independently establish first commercial sale.
  • Photographs on the specialist site are not licensed for reproduction and have not been copied.

Related profiles and lineages

Original research sources

Every row above links directly to its cited reference; publication or creation years are not interchangeable.