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Kissing Wide Fin Medaka
AdvancedOryzias latipes
An improved medaka whose dorsal and anal fins spread widely above and below, the extended rays branching into a white, feathery mass. Created in 2021 by Masaharu Tarumi as the wide-fin type of Marriage Longfin.
Difficulty
Advanced
Temperature
18〜28℃
Lifespan
2-3 years
Size
Up to about 4cm SL
Diet
Prepared medaka food, green water
About
Marriage Kissing Wide Fin is an improved medaka combining a blue body with external luminescence, longfin, wide fin and fusahire traits; its classification name is the blue external-luminescence longfin wide-fin fusahire medaka. It was created in 2021 by Masaharu Tarumi of Ehime Prefecture as the wide-fin type of Marriage Longfin, itself bred by crossing rinkou longfin (Tarumi longfin) with morpho, and is registered in the Medaka Web Encyclopedia as type No.0804 and variety No.0773. The dorsal and anal fins extend into a white, feathery mass; this effect arises because the rays of the extended fin branch and guanine, the fin sheen, gathers there. The underlying wide-fin trait began when Kenji Yamamoto found a male carrying it in 2016; it gives a broad caudal peduncle and a high ray count in the anal and dorsal fins. Wide fin was certified by the Japan Medaka Association in the 2021 fiscal year and is registered as certified variety No.36, Kitatsuji Hire Long, which the association's list records as created in 2021 by Kenji Yamamoto. The encyclopedia also registers an emerald-fin type, No.0832, as a separate variety.
Source: Wikipedia (CC BY-SA 4.0)
Lifespan of the Kissing Wide Fin Medaka
The Kissing Wide Fin Medaka lives 2-3 years.
Size of the Kissing Wide Fin Medaka
The Kissing Wide Fin Medaka grows to Up to about 4cm SL.
Temperature & humidity for the Kissing Wide Fin Medaka
The ideal temperature for the Kissing Wide Fin Medaka is 18〜28℃.
Basic Info
Origin
Japan (domestic variety created in 2021 by Masaharu Tarumi of Ehime Prefecture)
Care Specifications
- pH
- 7–8
- Hardness (GH)
- 9–19 dGH
- Water Temp.
- 18–28℃
PeacefulGroupBreeding: Hard
Sources: Medaka Web Encyclopedia: Complete Medaka Care Guide / FishBase Oryzias latipes / Medaka Web Encyclopedia No.0804 / Medaka Web Encyclopedia No.0831 (Marriage Longfin) / Japan Medaka Association: Certified New Variety List
Morphs (Varieties)
The Japan Medaka Association's classification manual sorts varieties by traits that can be seen rather than by genotype, and does not set out how individual traits are inherited. Traits the manual explicitly says can be passed on and produced by selective, multi-generation breeding are listed as line-bred; the rest are grouped under Other.
Other
Blue body colourExternal luminescence (taigaikou)Longfin (dorsal and anal fin-ray extension)Wide finFusahire (branching, feathery fin rays)Isshuukou (sheen encircling the body)
Sources: Japan Medaka Association: Variety Classification Manual, 5th ed. (Sep 2025) / Medaka Web Encyclopedia: Medaka Traits / Medaka Web Encyclopedia No.0804 / Medaka Web Encyclopedia: Wide Fin, fin-variation trait 37/44
A curated selection of notable morphs. Inheritance modes are a breeding-planning guide; actual appearance varies with combos.
References & Sources
Edited & verified by: BreederDirect editorial team
The taxonomic, regulatory, and husbandry data on this page are compiled and verified against the authoritative primary sources below.
Primary sources
- Wikipedia
- CITES Appendices (species not listed)
- FishBase (IUCN Red List: Least Concern, assessed 2018)
- Medaka Web Encyclopedia: Complete Medaka Care Guide
- Medaka Web Encyclopedia No.0804
- Medaka Web Encyclopedia No.0831 (Marriage Longfin)
- Japan Medaka Association: Certified New Variety List
- Japan Medaka Association: Variety Classification Manual, 5th ed. (Sep 2025)
- Medaka Web Encyclopedia: Medaka Traits
- Medaka Web Encyclopedia: Wide Fin, fin-variation trait 37/44
Taxonomy & Authority
Accepted name: Oryzias latipes (Temminck & Schlegel, 1846)
Breeder: 垂水政治 (2021)
Parentage: 鱗光ロングフィン（垂水ロングフィン） × モルフォ から作出したマリアージュロングフィンのワイドフィンタイプ
Authority databases: FishBase · GBIF · Medaka Web Encyclopedia No.0804 · Medaka Web Encyclopedia: Wide Fin, fin-variation trait 37/44
Nomenclature follows global taxonomic authority databases.
Regulations & Conservation Status
Not CITES-listedIUCN LC · Least Concern
Sources: CITES Appendices (species not listed) / FishBase (IUCN Red List: Least Concern, assessed 2018)
Regulations may change. Always verify the latest information with the relevant authorities.
Kissing Wide Fin Medaka Listings
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