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Shinkai Medaka
IntermediateOryzias latipes
Medaka with deep blue body color reminiscent of the deep sea. Deeper and more mysterious blue than Marine Blue. Looks most beautiful in dark containers.
Difficulty
Intermediate
Temperature
5〜30℃
Lifespan
2-3 years
Size
3-4cm
Diet
Medaka pellets, daphnia
About
Shinkai (Deep Sea) medaka is an improved variety with deep blue body color evoking the deep sea, as the name suggests. Its indigo-blue is deeper than typical Marine Blue, with the deep-sea mystique standing out most in black containers. Blue intensity varies with light angle, offering depth from every viewing direction. Among the deepest blue of all blue medaka varieties, it commands especially strong support from blue medaka collectors. White containers best reveal the blue coloration most vividly. Selecting the most deeply blue individuals for breeding maintains deep-blue lineages. Compatible with green water environments. Peaceful and easy to breed with spawning mats.
Lifespan of the Shinkai Medaka
The Shinkai Medaka lives 2-3 years.
Size of the Shinkai Medaka
The Shinkai Medaka grows to 3-4cm.
Temperature & humidity for the Shinkai Medaka
The ideal temperature for the Shinkai Medaka is 20〜28℃.
Hardy in 5–30°C, neutral to slightly alkaline water.
Basic Info
Origin
Japan (selectively bred variety)
Lifespan
2-3 years
Size
3-4cm
Temperature
Care Specifications
- pH
- 7–8
- Hardness (GH)
- 9–19 dGH
- Water Temp.
- 20–28℃
PeacefulGroupBreeding: Easy
Sources: FishBase: Oryzias latipes / Seriously Fish: Oryzias latipes
Morphs (Varieties)
Selectively bred killifish are trait combinations of body form × body color × pattern × luminescence (internal/external) × scale types (transparent scales) × sparkle × fin morphology and so forth. Published entries include only confirmed traits constituting the given variety, with genetic inheritance patterns provided only for confirmed traits (uncertain cases omitted). Genetic patterns are provided as reference for breeding.
Other
Deep-blue body
Sources: JMA Japan Medaka Association — Improved Medaka Variety Classification Manual (JA) / Improved Medaka Web Encyclopedia (medakazukan, JA)
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.
Taxonomy & Authority
Accepted name: Oryzias latipes (Temminck & Schlegel, 1846)
Synonyms: Aplocheilus latipes (Temminck & Schlegel, 1846), Poecilia latipes Temminck & Schlegel, 1846, Oryzias latipes latipes (Temminck & Schlegel, 1846)
Authority databases: FishBase · GBIF · Japan Medaka Association — Variety Classification Manual (JA)
Nomenclature follows global taxonomic authority databases.
Regulations & Conservation Status
Not CITES-listed
Oryzias latipes. Not listed in the CITES Appendices (checked on Species+, 2026-09-18).
Sources: Species+ (CITES)
Regulations may change. Always verify the latest information with the relevant authorities.
Shinkai Medaka Listings
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