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AQUAPEDIA / SOURCE-LINKED RESEARCH

Swallow Medaka / Fuga

スワロー / 風雅

Historical Medaka research entryEvidence by claimIndependent review ongoing

A 2014 catalog credits Yoshito Tsushima of Aomori with Swallow (Fuga), a Medaka fin-extension form.

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: Swallow Medaka / Fuga; Japanese romaji: not verified; Japanese characters: スワロー / 風雅. 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 1Youkihi-derived breeder stock:red/orange, faded-red and albinoindividualsFOCAL STRAINAMERICAN / ENGLISH NAMESwallow Medaka / FugaJAPANESE NAME (ROMAJI)Not verifiedJAPANESE LETTERS (日本語)スワロー / 風雅
Dashed connectors show breeder-reported input or selection history; they do not prove genetic parentage. Not a confirmed genotype or parent-fish identification.

Reported 2012 discovery, 2013 observed heritability, 2014 selection fixation; no individually identified parent couple, mating order or tested allele Source: Medaka WEB Zukan No.0341 quoting 2015 Medaka Hyakka Vol.2 (Tsushima historical account)

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View this strain’s illustrated gene tree in Discord ↗

Lineage review · Batch 20: The reviewed records do not establish a defensible breeding cross; picture ancestry remains disconnected. Original specialist source ↗

Overview

The defining trait concerns portions of fins extending significantly beyond surrounding rays. The naming is inspired by a superficially similar guppy fin form, not evidence of hybridization between species. Historical creator/source attribution: Yoshito Tsushima / 対馬義人.

Claim-by-claim evidence

Research findingEvidence classDirect references
The historical 2014 archive credits 対馬義人 (Aomori) as breederDated specialist attributionH89 ↗
The recorded variety name is Swallow Medaka with the nickname Fuga / 風雅Documented name equivalenceH89 ↗
Its distinguishing morphological feature is localized elongation of sections of the finsCatalog phenotype descriptionH89 ↗
Reference to the swallow guppy describes naming resemblance only; it is not a fish-cross pedigreeInterpretation caution grounded in source textH89 ↗

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

Known research gaps

  • Direct named Medaka parent lines and fin inheritance controls are unspecified.
  • Not all longfin varieties are Swallow; Matsui Long Fin and Real Long Fin are separate definitions.
  • DNA-verified ancestry, independent inheritance ratios and authenticated present-day stock provenance require further source review.
  • No third-party photographs are rehosted without documented permission.

Related profiles and lineages

Original research sources

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