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AQUAPEDIA / SOURCE-LINKED RESEARCH

Pink Swallow (Koharu)

ピンクスワロー / 小春

Historical Medaka varietyEvidence by claimIndependent review ongoing

Oba's Koharu is a pink-bodied Swallow Medaka, with localized fin-ray elongation.

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: Pink Swallow (Koharu); Japanese romaji: not verified; Japanese characters: ピンクスワロー / 小春. 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 1Pink Medaka body-color familyREPORTED INPUT / STAGE 2Swallow fin-line crosses and selectionby ObaFOCAL STRAINAMERICAN / ENGLISH NAMEPink Swallow (Koharu)JAPANESE NAME (ROMAJI)Not verifiedJAPANESE LETTERS (日本語)ピンクスワロー / 小春
Dashed connectors show breeder-reported input or selection history; they do not prove genetic parentage. Not a confirmed genotype or parent-fish identification.

Original breeder describes crossing pink stock with Swallow forms and subsequent stabilization, not genotype proof Source: Medaka no Yakata original 2017 Pink Swallow breeder history

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View this strain’s illustrated gene tree in Discord ↗

Lineage recheck · Batch 026: Original breeder/archival account describes this stock origin or multigeneration selection. Dashed connectors document history, not DNA or individual fish parents. Source evidence ↗

Lineage review · Batch 19: The reviewed records do not establish a defensible breeding cross; picture ancestry remains disconnected. Original specialist source ↗

Overview

Oba's Koharu is a pink-bodied Swallow Medaka, with localized fin-ray elongation. Historical catalog creator attribution: Yukio Oba / 大場幸雄 (Hiroshima). The 2017 historical variety group is a documentary context, not proof of the first sale.

Claim-by-claim evidence

Research findingEvidence classDirect references
Historical catalog creator attribution: Yukio Oba / 大場幸雄 (Hiroshima).Historical maker credit or explicitly unknownH12 ↗
The catalog compares its soft pink body color to a light pink/nadeshiko hue and speculates about pigment-cell contributions.Specialist archival variety description; development steps may be omittedH12 ↗
Pink body color and Swallow-type extended fin rays, not necessarily bright red pigmentation.Historical observable phenotype, not a genetic assayH12 ↗
The historical source's proposed ci-gene mechanism is speculative and has not been validated in this entry. Documented in the 2017 historical variety group.Editorial interpretation bound to historical catalog contextH12 ↗

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

Known research gaps

  • Precise commercial introduction dates, actual founder specimen IDs and complete generation-by-generation records are not fully documented in this catalog.
  • The named phenotype or historical breeding description is not a DNA-verified pedigree or a guaranteed inheritance ratio.
  • Current breeder-authenticated stock, precise strain-specific water parameters and photograph licensing remain unconfirmed.

Related profiles and lineages

Original research sources

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