Overview
Youkihi is a commonly used nickname for a vivid vermilion/red-orange ornamental Medaka. It is associated with the formal color classification 朱赤, not a unique molecular genotype.
Claim-by-claim evidence
| Research finding | Evidence class | Direct references |
|---|---|---|
| The 2004 creator record identifies Yukio Oba and the original Youkihi line | First-party dated historical catalog | O1 ↗ O3 ↗ |
| Oba recounts selection of an unusually red-orange female from a Kohaku-related breeding population | First-person breeder account | O2 ↗ |
| The breeder reports later selection and descendant branches, rather than one defined modern genetic test | First-person history; interpretation limited | O2 ↗ |
| 楊貴妃 is the house nickname; 朱赤 is the formal red-orange body-color term | Specialist classification | O3 ↗ O4 ↗ |
Evidence labels refer to documentary strength. They do not assert independently tested genetics.
Known research gaps
- Direct genetic mechanisms of the distinctive color are not proven by these historical records.
- Do not equate modern derivative strains, sizes, body types or numbered lines with the original stock without documentation.
- Strain-specific water chemistry, disease resistance and fixed grade metrics are not demonstrated.
Related profiles and lineages
Original research sources
Every row above links directly to its cited reference; publication or creation years are not interchangeable.
- O1: Medaka no Yakata historic breeder catalog — First-party dated catalog
- O2: Yukio Oba: first-person Youkihi origin narrative — Breeder's first-person account
- O3: Medaka WEB Zukan: Youkihi — Specialist historical record
- O4: Japanese Medaka Association historical classification — Association classification history