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AQUAPEDIA / SOURCE-LINKED RESEARCH

Silver Hikari (Ginga)

シルバーヒカリメダカ / 銀河

Historical Medaka named variety or selected lineEvidence by claimIndependent review ongoing

Oba's Silver Hikari / Ginga is an iridescent silvery-bodied Medaka described with yellow-toned tail and sometimes reflective lame points.

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: Silver Hikari (Ginga); Japanese romaji: not verified; Japanese characters: シルバーヒカリメダカ / 銀河. 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 1Blue Pearl (pale-blue) medaka breedingpopulation selected for strongerguanine/silver sheenFOCAL STRAINAMERICAN / ENGLISH NAMESilver Hikari (Ginga)JAPANESE NAME (ROMAJI)Not verifiedJAPANESE LETTERS (日本語)シルバーヒカリメダカ / 銀河
Dashed connectors show breeder-reported input or selection history; they do not prove genetic parentage. Not a confirmed genotype or parent-fish identification.

Reported 4-5-year selection of Blue Pearl source family, announced as Silver Hikari/Ginga in 2005; no separately documented Hikari stock crossing or individual parent pair Source: Medaka no Yakata original Ginga/Kirameki development history

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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

Oba's Silver Hikari / Ginga is an iridescent silvery-bodied Medaka described with yellow-toned tail and sometimes reflective lame points. Distinct archive breeder credit and source-scoped provenance are documented below.

Claim-by-claim evidence

Research findingEvidence classDirect references
The historic catalog credits Yukio Oba / 大場幸雄 (Hiroshima); Original breeder-described silver selection.Breeder attributed in original Japanese specialist catalogueH78 ↗
The farm reports creating the line in 2005 and emphasizes a silver body contrasted with yellow pigmentation in fin and head regions, with attention to the female fin expression.Reported historical breeder description; full parent log not providedH78 ↗
Silvery-white reflective body, yellow tail/fin contrast and sometimes sparkle-like spots.Observable ornamental traits only, not genetic diagnosisH78 ↗
The breeder's descriptions of sex-linked expression and inheritance are not independently replicated genetic studies. Date reference: Breeder reports created 2005.Recorded naming and chronological limits; no DNA or current stock proofH78 ↗

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

Known research gaps

  • Date-group placement is source-reported and not proof of verified first sale or all original breeder generations.
  • Incomplete founder stock identities, absence of independently verified molecular genetics and uncertain current-shop stock authenticity.
  • Original historical photograph copyrights not cleared; external source photographs are not redistributed.

Related profiles and lineages

Original research sources

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