Black Miyuki Long Fin Medaka (黒幹之ヒレ長メダカ) – Flowing Elegance in Black and Silver

Black Miyuki Long Fin Medaka (黒幹之ヒレ長メダカ) is a captivating ornamental strain that combines the intense black coloration of black-bodied medaka with the luminous dorsal glow of the classic Miyuki line. What truly sets this strain apart, however, is the addition of the Long Fin trait (ヒレ長), which creates a flowing, elegant aesthetic as the fish glides through the water. Each fin — dorsal, anal, and caudal — is extended in graceful proportion, giving this medaka a refined and majestic presence.

🧬 Origin & Lineage

• Strain Type: Black Miyuki with Long Fin expression
• Lineage: Crossed from deep black medaka × Miyuki dorsal shine × Long Fin trait
• Long Fin History: The Long Fin (Hire-Naga) gene was developed in 2015 by Japanese breeder Katsujirou Matsui (松井勝次郎), later introduced to various lines including the Black Miyuki
• Trait Emphasis: Strong dorsal shimmer with extended fins and rich body tone

🎨 Physical Characteristics

• Body Color: Deep, solid black for strong contrast
• Dorsal Shine: Silvery-white Miyuki-style glow along the upper spine
• Fin Length: Elongated dorsal, anal, and caudal fins that flow elegantly during motion
• Body Type: Standard body with symmetrical structure
• Visual Balance: Perfect contrast of dark body and bright highlight zones

💎 Visual Impact

The Black Miyuki Long Fin Medaka offers a rare combination of bold contrast and delicate grace. Its fins trail behind like silk in water, and the shimmering dorsal shine adds dimension and visual weight to its upper silhouette. This strain is ideal for viewing from above — in black tubs or glass aquariums — where the contrast and movement are most evident. When seen in motion, it evokes the beauty of long-fin koi on a miniature scale.

🌟 Related Strains

• Black Miyuki Medaka: A black-body medaka with Miyuki dorsal shine, without long fins
• Miyuki Long Fin: A silver/blue-bodied long-fin version of the Miyuki strain
• Orochi Long Fin: Full-black long-fin medaka without Miyuki shine

🖍️ Conclusion

Black Miyuki Long Fin Medaka is a testament to what thoughtful and artistic breeding can achieve. It brings together depth, contrast, movement, and refinement — all in a single elegant fish. For hobbyists and breeders alike, this strain represents one of the finest expressions of ornamental medaka breeding, offering presence, poise, and personality in every motion.

※ This article is based on information and images from 改良メダカWEB図鑑 (Medaka Zukan).
※ Photos provided by SNR KOREA. Unauthorized reproduction or commercial reuse is strictly prohibited.