Picture gene & lineage tree
Visual pedigree of breeder-reported inputs, where available. Dashed arrows represent documentary claims or selection history, not DNA-tested genes.
Breeder describes yellow-fin variants from Pure Black small-eye source line; no verified individual original male/female or DNA genotype. Source: Medaka no Yakata original published selection/lineage overview
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View this strain’s illustrated gene tree in Discord ↗
Lineage review · Batch 030: Breeder describes yellow-fin variants from Pure Black small-eye source line; no verified individual original male/female or DNA genotype. Original breeder source ↗
Lineage review · Batch 016: The reviewed sources do not establish a defensible specific parent mating; the illustrated pedigree intentionally remains disconnected. Review Japanese specialist record ↗
Overview
An early black and gold small-eye selection with dark body coloration, gold in the fins and the characteristic small-eye appearance. Distinct archive breeder credit and source-scoped provenance are documented below.
Claim-by-claim evidence
| Research finding | Evidence class | Direct references |
|---|---|---|
| The historic catalog credits Yukio Oba / 大場幸雄 (Hiroshima); Oba original selected color-and-eye form. | Breeder attributed in original Japanese specialist catalogue | H78 ↗ |
| The original farm reports it developed this line in 2002 with a black or brown-black body and gold fins; the pure-dark appearance is described as relatively independent of container background. | Reported historical breeder description; full parent log not provided | H78 ↗ |
| Dark body, minute eyes and golden fin areas distinguish Rikyu from the uniformly dark Kurobee type. | Observable ornamental traits only, not genetic diagnosis | H78 ↗ |
| Do not infer its exact named mother/father pairing from the shared Pure Black family description. Date reference: Catalog year 2002. | Recorded naming and chronological limits; no DNA or current stock proof | H78 ↗ |
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.
- H78: Medaka no Yakata — historical creator catalog, 2001–2011 — Historical original-farm descriptions, subgroup labels and breeder credits