Jet-black medaka with no color fading from background adaptation. A fixed variety where depth of black determines value.
Orochi medaka is an improved variety with jet-black coloration covering the entire body — not just the scales but also the peritoneum, internal organs, and fins, all richly pigmented with melanophores. Unlike most medaka that pale in bright containers through adaptive coloration, Orochi maintains its black even in white containers, effectively having no background adaptation response. Named for its overwhelming black presence reminiscent of Yamata no Orochi (the eight-headed serpent of Japanese mythology). Hardy in 5–30°C. Widely used as a breeding parent for black-body varieties, forming the foundation for Black Diamond and Orochi lame strains.
Origin
Japan (selectively bred variety)
Lifespan
2-3 years
Size
3-4cm
Temperature
5〜30℃（適温20〜28℃）
Medaka pellets
Maintains black even in white containers
5-30°C
F1 maintains high black coloring rate
Select blackest individuals to fix trait
Some individuals may have weaker constitution
Beginner. This is a beginner-friendly species. No special equipment or experience is required, and it can be kept successfully with basic care setup.
The ideal temperature for Orochi Medaka is 5〜30℃（適温20〜28℃）. Avoid sudden temperature changes and maintain a stable environment.
The average lifespan of Orochi Medaka is 2-3 years. With proper care and nutrition, they can live a long and healthy life.
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Orochi Medaka typically reaches 3-4cm as an adult. Size may vary depending on care conditions and individual genetics.
Orochi Medaka feeds on: Medaka pellets. Aim for a balanced diet with appropriate feeding frequency.
The price of Orochi Medaka varies significantly depending on morph, size, and lineage. Check our market price page for the latest pricing information.