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Samurai Medaka
IntermediateOryzias latipes
A medaka whose dorsal fin splits into two, its sharp form likened to a samurai's sword. A strain prized for the shape of the fin itself.
Difficulty
Intermediate
Temperature
15〜28℃
Lifespan
2-3 years
Size
Body length 3-4cm
Diet
Mainly prepared feed, supplemented with live food (brine shrimp, daphnia); fine powdered food for fry.
About
Samurai is a medaka whose dorsal fin splits into two where part of the fin membrane or rays is missing, the sharp blades likened to swords, and the fin shape itself is the point of interest. It rarely arises from the normal body type, appearing instead from the light (hikari) or light-daruma types, so the top-body luster and the split fin are best appreciated viewed from above. Care is ordinary and outdoor-friendly at 15-28°C, but because the split-fin trait is not strongly fixed, careful selection of well-split parents is needed; avoid overcrowding since the divided fin damages easily.
Basic Info
Origin
Japan (selectively bred)
Lifespan
2-3 years
Size
Body length 3-4cm
Temperature
15〜28℃
Diet
Mainly prepared feed, supplemented with live food (brine shrimp, daphnia); fine powdered food for fry.
Care Guide
Coloration & Traits
Part of the dorsal fin membrane or rays is missing, splitting the dorsal into two blades likened to swords; combined with various color lines such as miyuki or yellow.
Care Tips
Care is like any improved medaka and it grows outdoors; combined with the light (hikari) body type, it is best appreciated viewed from above.
References & Sources
Edited & verified by: br-choku editorial team
The taxonomic, regulatory, and husbandry data on this page are compiled and verified against the authoritative primary sources below.
Primary sources
Taxonomy & Authority
Accepted name: Oryzias latipes
Authority databases: 改良メダカWEB図鑑 · 日本メダカ協会 品種分類マニュアル
Nomenclature follows global taxonomic authority databases.
Samurai Medaka Listings
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