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The Shinkai Hirenaga Medaka is a captivating variety that combines the serene blue hue of the original Shinkai Medaka with elegantly elongated fins, resulting in a fish that is both graceful and visually striking.​

Physical Characteristics:

• Body Color: Exhibits a clear, refreshing blue tone with minimal black pigmentation, characteristic of the Shinkai lineage.​
• Unique Trait: Possesses the rare “blue peritoneum” (fukumaku ao), an internal blue coloration seen only in Shinkai and Marine Blue varieties.​
• Fins: All fins are notably elongated, contributing to a refined and elegant swimming appearance. The length and shape of the fins can vary among individuals.​

Breeding and Lineage:

• Origin: Developed by introducing the long-fin trait into the Shinkai Medaka, enhancing its aesthetic appeal.​
• Stability: The Shinkai Medaka itself, created in 2010 by breeder Ryusei Nagaoka, is known for its high genetic stability and distinctive blue coloration. The addition of the long-fin trait builds upon this stable foundation.​

Care and Maintenance:

• Environment: Thrives in well-maintained aquatic settings with clean water and ample space to accommodate its flowing fins.​
• Diet: A balanced, nutrient-rich diet supports overall health and enhances coloration.​
• Observation: Regular monitoring is recommended to ensure the elongated fins remain intact and free from damage or infection.​

Conclusion:

The Shinkai Hirenaga Medaka is a harmonious blend of tranquil blue coloration and graceful fin elongation, making it a prized addition for enthusiasts seeking both beauty and elegance in their medaka collection.

Image and translation courtesy of: https://medakazukan.net/0878_sinkaihirenaga/