Shukogyoku Medaka – 朱紅玉メダカ

An elegant evolution of crimson brilliance and luminous depth

Physical Characteristics
The Shukogyoku Medaka is a refined tricolor improved medaka variety featuring a beautifully balanced blend of red, white, and black, enhanced by a strong layer of external light (体外光 / gai kou).

Key traits include:

• Vivid crimson red body tone, more intense than its predecessor, the Kogyoku Medaka
• A silky dorsal layer of external light, enhancing its elegance in motion
• Tricolor base (red/white/black) with a harmonious, natural expression
• Excellent presence in both top-view and side-view display

Its deeper and more vivid red coloration, especially around the head and back, makes it particularly eye-catching in sunlight or LED lighting.

Origin and Development

• Breeder: Medaka no Beans (めだかのビーンズ)
• Region: Ehime Prefecture, Japan
• Released: June 2019
• Derived From: An enhanced line of Kogyoku Medaka (紅玉メダカ)
• Breeding Focus: Increasing the red intensity and shine compared to the original line

The name “Shukogyoku” (朱紅玉) reflects its red jewel-like quality—literally meaning “vermilion crimson jewel.”

Viewing Style & Recommendations

• Best appreciated in black or dark-colored tubs for contrast
• Top-view bowls bring out the tricolor layering
• Responds well to natural sunlight, which intensifies the external glow

Conclusion
The Shukogyoku Medaka is a striking example of medaka refinement, embodying the pursuit of deeper color and polished form. A must-have for collectors who seek both elegance and visual clarity, this medaka is not only aesthetically rich but also a symbol of the evolution of improved Japanese medaka lines.

Sources / 出典

• 品種図鑑 – 朱紅玉メダカ | 改良メダカ図鑑 さつまのメダカ屋さん
• Photos provided by SNR Korea