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Medaka Encyclopedia

Welcome to our Medaka Encyclopedia – your complete guide to Japanese rice fish (Oryzias latipes).

Josui Medaka – 如水メダカ

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Josui Medaka (如水メダカ) A graceful blend of Swallow fins and Morpho brilliance Overview The Josui Medaka (如水メダカ) is a captivating ornamental strain that brings together the elegant Swallow fin trait and the luminous Morpho blue iridescence. As it swims, the extended, glimmering fins ripple like silk in water — a truly mesmerizing display of form and color. Breeder and Release This variety was created through careful crossbreeding between a Black Morpho Hikari-type (MLFH × BMA line) and Ryū no Tategami (a Blue Miyuki Swallow Hikari-type). The goal: to isolate and stabilize the Morpho glow in a Swallow fin body. The name Josui was inspired by Kuroda Josui, a famous samurai from Fukuoka Prefecture — the birthplace of the original Morpho strain. Key Features Fixation Rate By the F4 generation, Josui has achieved a fixation rate of over 50% for the ideal combination of Morpho shine and Swallow fin traits — making it not only beautiful but also stable in breeding. Conclusion The Josui Medaka is a beautiful harmony of structure and glow — a rare and refined variety that speaks to the elegance possible through medaka breeding. With its graceful movement and glittering fins, Josui is an ideal choice for collectors who appreciate medaka with depth, history, and uniqueness. Image and translation courtesy of: https://medakazukan.net/post_lp/%e5%a6%82%e6%b0%b4/

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Josui Medaka – 如水メダカ

March 30, 2025 No Comments

Josui Medaka (如水メダカ) A graceful blend of Swallow fins and Morpho brilliance Overview The Josui Medaka (如水メダカ) is a captivating ornamental strain that brings together the elegant Swallow fin trait and the luminous Morpho blue iridescence. As it swims, the extended, glimmering fins ripple like silk in water — a truly mesmerizing display of form and color. Breeder and Release This variety was created through careful crossbreeding between a Black Morpho Hikari-type (MLFH × BMA line) and Ryū no Tategami (a Blue Miyuki Swallow Hikari-type). The goal: to isolate and stabilize the Morpho glow in a Swallow fin body. The name Josui was inspired by Kuroda Josui, a famous samurai from Fukuoka Prefecture — the birthplace of the original Morpho strain. Key Features Fixation Rate By the F4 generation, Josui has achieved a fixation rate of over 50% for the ideal combination of Morpho shine and Swallow fin traits — making it not only beautiful but also stable in breeding. Conclusion The Josui Medaka is a beautiful harmony of structure and glow — a rare and refined variety that speaks to the elegance possible through medaka breeding. With its graceful movement and glittering fins, Josui is an ideal choice for collectors who appreciate medaka with depth, history, and uniqueness. Image and translation courtesy of: https://medakazukan.net/post_lp/%e5%a6%82%e6%b0%b4/

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Josui Medaka – 如水メダカ

March 30, 2025 No Comments

Josui Medaka (如水メダカ) A graceful blend of Swallow fins and Morpho brilliance Overview The Josui Medaka (如水メダカ) is a captivating ornamental strain that brings together the elegant Swallow fin trait and the luminous Morpho blue iridescence. As it swims, the extended, glimmering fins ripple like silk in water — a truly mesmerizing display of form and color. Breeder and Release This variety was created through careful crossbreeding between a Black Morpho Hikari-type (MLFH × BMA line) and Ryū no Tategami (a Blue Miyuki Swallow Hikari-type). The goal: to isolate and stabilize the Morpho glow in a Swallow fin body. The name Josui was inspired by Kuroda Josui, a famous samurai from Fukuoka Prefecture — the birthplace of the original Morpho strain. Key Features Fixation Rate By the F4 generation, Josui has achieved a fixation rate of over 50% for the ideal combination of Morpho shine and Swallow fin traits — making it not only beautiful but also stable in breeding. Conclusion The Josui Medaka is a beautiful harmony of structure and glow — a rare and refined variety that speaks to the elegance possible through medaka breeding. With its graceful movement and glittering fins, Josui is an ideal choice for collectors who appreciate medaka with depth, history, and uniqueness. Image and translation courtesy of: https://medakazukan.net/post_lp/%e5%a6%82%e6%b0%b4/

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Fromage Medaka

Fromage Medaka (プロマージュ) – The Soft Glow of Refinement The Fromage medaka (プロマージュ) is an exquisite Japanese rice fish variety

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Yokihi Albino Medaka

Youkihi Albino Medaka (楊貴妃アルビノ) – The Charm of Crimson and Light The Youkihi Albino medaka (楊貴妃アルビノ) is a stunning Japanese

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