Picture gene & lineage tree
Visual pedigree of breeder-reported inputs, where available. Dashed arrows represent documentary claims or selection history, not DNA-tested genes.
Documented introduction of transparent-scale expression into amber stock Source: Medaka WEB Zukan Benijake original history
Browse the larger Medaka lineage atlas ↗
View this strain’s illustrated gene tree in Discord ↗
Lineage review · Batch 23: Historical source describes the breeding stock or selected form shown by dashed connections. This does not establish individual parentage, genotype, or dominance. Original specialist 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
Benijake is an Amber-family transparent-scale Medaka historically attributed to 仁井谷努. The archive credits a transparent-scale introduction into Amber stock; an independent cultivar catalogue identifies the 2007 Benijake origin and creator. Creator-versus-discoverer status is source-scoped.
Claim-by-claim evidence
| Research finding | Evidence class | Direct references |
|---|---|---|
| Historical record: Tsutomu Niitani / 仁井谷努 (Romanization provisional) — Creator credited by two specialist catalogues. | Archive maker or discoverer attribution | E78 ↗ |
| The archive credits a transparent-scale introduction into Amber stock; an independent cultivar catalogue identifies the 2007 Benijake origin and creator. | Source-described historical breeding and development, not independently genotyped | E78 ↗ BEN ↗ |
| An amber base with transparent-scale expression; red gill area or altered pigment distribution can be visible in such fish. | Visual phenotype only; individual expression can vary | E78 ↗ BEN ↗ |
| The specialist account describes historical importance for transparent-scale expression in ornamental colored stock; it does not establish a unique genome marker. Historical context: 2007. | Editorial distinction grounded in cited source; exact sale dates not guaranteed | E78 ↗ BEN ↗ |
Evidence labels refer to documentary strength. They do not assert independently tested genetics.
Known research gaps
- The exact underlying transparent-scale founding stock and any current commercial identity need separate confirmation.
- Cited first-generation and selected-parent statements do not prove DNA genotype, inheritance rate or present-day breeder-stock identity.
- No third-party breeder/catalogue image is reproduced; photo rights and original genetic records require independent review.
Related profiles and lineages
Original research sources
Every row above links directly to its cited reference; publication or creation years are not interchangeable.
- BEN: Medaka WEB Zukan: Benijake amber transparent scale — Independent breeder attribution and 2007 historical taxonomy
- E78: Medaka no Yakata: 2001–2011 historical breeder/variety catalog — Original shop's historical chronology; dated groupings and breeder credits