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/retailer-reported breeding stock; breeder-original ledger and genetic parentage not verified Source: Japanese specialist catalogue and 2024 stock-keeper cross report crediting Nao Medaka
Identity and history
Kinkai (金塊, literally “gold nugget” or “gold bullion”) is attributed to Yoshinao Kuwae (桑江良直) of Nao Medaka (直めだか), Okinawa. Sources report its introduction in 2023; one stock retailer specifies August 2023. This date is source-reported, not a verified first breeder sale.
Appearance
Gold-toned ornamental lame scaling is a reported defining phenotype. Grading criteria, inheritance and stable expression percentages are not independently established.
Source-reported family tree
These are dashed, specialist/retailer-reported parental stock edges, not DNA tests or independently authenticated named founder specimens. Do not replace original Lecris with Lecris Unlimited, which is a distinct later derivative. Parent names do not establish an exact sex direction, F-generation scheme or guaranteed trait transmission. Original Lecris founder ancestry remains unknown.
Husbandry, breeding, health and compatibility
Standard medaka care with conditioned stable freshwater and quarantine. Grade adult lame appearance with consistent top and lateral views; keep pair-by-pair provenance and offspring records. No strain-specific health intervention or inheritance ratio is verified.
Claim-level evidence
1. Specialist strain index — attributed creator, 2023, ラメ王 × レクリス
2. Retail keeper stock statement dated 2024-06-13 — identifies Nao Medaka creator stock, August 2023 introduction, ラメ王 × レクリス
Both sources may repeat the same breeder narrative and are not independent DNA evidence. Primary breeder confirmation, source fish records, formal grading and photograph reuse rights remain open. No third-party photos republished.
Public research references
Listed research leads are not automatically supporting evidence for every individual claim.
No eligible public supporting URLs are attached to this summary yet.