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AQUAPEDIA / SOURCE-LINKED RESEARCH

Vermilion Bubble Eye (Kayo)

朱赤水泡眼 / 香世

Historical Medaka research identityEvidence by claimIndependent review ongoing

A vermilion Medaka with bubble-eye appearance, historically nicknamed Kayo.

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: Vermilion Bubble Eye (Kayo); Japanese romaji: not verified; Japanese characters: 朱赤水泡眼 / 香世. 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 1Kubo Youkihi keeper-family offspring(stock included Youkihi No.5 and laterTotenko; precise mother/father fishnot recorded)FOCAL STRAINAMERICAN / ENGLISH NAMEVermilion Bubble Eye (Kayo)JAPANESE NAME (ROMAJI)Not verifiedJAPANESE LETTERS (日本語)朱赤水泡眼 / 香世
Dashed connectors show breeder-reported input or selection history; they do not prove genetic parentage. Not a confirmed genotype or parent-fish identification.

Keeper reports Youkihi-family bubble-eyed fish born around October 2007 and recognized in March-April 2008. Breeding-source population documented, BUT original bubble-eye condition's inheritance unconfirmed; 2020 heritable Hitomi is a different line. Source: Medaka no Yakata 2008 spring contest: original discoverer Tomoe Kubokouchi interview

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Lineage review · Batch 21: Tomoe Kubokouchi documents Kubo Youkihi source stock, including Youkihi No.5 and later Totenko, before Kayo's 2008 discovery. This is keeper-stock history only: individual parents are not identified, and heritability of the original bubble-eye condition was not confirmed. Do not equate it with later Hitomi. Original specialist source ↗

Overview

A vermilion Medaka with bubble-eye appearance, historically nicknamed Kayo. The 2008 historical account records appearance at the first spring medaka exhibition and names the body form by comparison to bubble-eye goldfish. Creator-versus-discoverer status is source-scoped.

Claim-by-claim evidence

Research findingEvidence classDirect references
Historical record: Tomoe Kubokawachi / 久保河内巴 (romanization provisional) — Original discoverer / exhibition fish keeper credited.Archive maker or discoverer attributionE78 ↗
The 2008 historical account records appearance at the first spring medaka exhibition and names the body form by comparison to bubble-eye goldfish.Source-described historical breeding and development, not independently genotypedE78 ↗
Bubble-like eye-region protrusions are the documented visual trait, against a scarlet body.Visual phenotype only; individual expression can varyE78 ↗
Similarity to goldfish is descriptive terminology, not a goldfish × Medaka hybrid ancestry claim. Historical context: 2008 historical catalog section.Editorial distinction grounded in cited source; exact sale dates not guaranteedE78 ↗

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

Known research gaps

  • The eye-form description alone cannot establish inheritance, health impact, or exact first-breeding date.
  • Cited first-generation and selected-parent statements do not prove DNA genotype, inheritance rate or present-day breeder-stock identity.
  • No third-party breeder/catalogue image is reproduced; photo rights and original genetic records require independent review.

Related profiles and lineages

Original research sources

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