Picture gene & lineage tree
Visual pedigree of breeder-reported inputs, where available. Dashed arrows represent documentary claims or selection history, not DNA-tested genes.
Specialist account attributes a 2009 discovery to Tomatsu; related classification passage says internal-light specimen exhibited in 2008. Chronology disputed; parent fish, sex and F stages unknown. Source: Medaka WEB Zukan No.0118 (Saiko; Tomatsu source and Miyuki-derived body internal light)
Browse the larger Medaka lineage atlas ↗
View this strain’s illustrated gene tree in Discord ↗
Lineage review · Batch 21: The reviewed records do not establish a defensible breeding cross; picture ancestry remains disconnected. Original specialist source ↗
Overview
Saiko records an internal-blue-white light appearance viewed within the body rather than the classic surface exterior-light band of Miyuki. 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 Tomatsu / 戸松具視 (Saitama; given-name romanization unconfirmed); Discoverer/exhibitor, not necessarily creator of every later internal-light Medaka. | Breeder attributed in original Japanese specialist catalogue | H78 ↗ |
| The historical account says a fish displayed by 戸松具視 appeared at a 2008 competition and describes internal luminous appearance as distinct from ordinary Miyuki external shine. | Reported historical breeder description; full parent log not provided | H78 ↗ |
| Blue-white internal-body luminous appearance, compared figuratively to light just after fluorescent lighting goes off. | Observable ornamental traits only, not genetic diagnosis | H78 ↗ |
| Neither apparent light nor the nickname indicates bioluminescence or artificial genetic modification. Date reference: Catalog section 2009; exhibition described as 2008. | 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