Medaka Encyclopedia — 87 Species Directory

Blue body color combined with hikari body type. Bluish body with silvery-blue external light creates cool and fantastical beauty. Especially beautiful in outdoor sunlight.

Improved medaka characterized by deep red color. Beautiful vivid crimson body color reminiscent of azami (thistle) flowers. Among red medaka, this variety is prized for its especially deep coloration.

Improved medaka with short, round daruma body type. Adorable plump form has high ornamental value. Warm water is essential for maintaining body shape.

Improved medaka with beautiful blue external body light. Named because the blue-white external light emanating from the back evokes a galaxy. Popular variety with fantastical beauty like a nighttime water surface.

Improved medaka with white body color and red eyes (albino). Named for its cute appearance resembling a white rabbit. Impressive contrast between clear white body and red eyes.

Multicolored glitter scattered across body radiates like fireworks. Lame changes to rainbow colors with light angle. Rapidly gaining popularity as a summer icon.

The oldest improved medaka variety, kept since the Edo period. Friendly orange-yellow color and extreme hardiness. Perfect for biotope beginners.

Improved medaka with deep emerald green body reminiscent of jade. Green medaka are rare, with unique coloration popular among collectors. Color shifts with light angle.

Gorgeous variety combining red, white, and black tricolor with elongated fins. Beautiful combination of phoenix-like graceful long fins and complex body coloration. Advanced collector's variety.

Striking variety with jet-black body and yellow lame. Named for yellow flashes of lightning on black body. High ornamental value due to vivid contrast.

Medaka variety with jet-black body. Darker than Black Diamond lineage, with fins also deeply black being most valued. Appreciated for understated beauty.

Premium modified medaka with multicolor lame scattered all over the body. Dazzling rainbow shimmer changes with light angle. Difficult to fix — for advanced keepers.

Improved medaka with beautiful golden body. Hikari body type with especially strong back shine. Gold gleam stands out viewed from above. Considered auspicious, popular as gifts.

Red and white bicolor medaka like Kohaku koi. Each individual has unique markings. Color fixation is challenging, making selection deeply rewarding.

Improved Youkihi with deeper, more intense crimson. The name 'Koutei' reflects its regal red. Color deepens outdoors.

Superior variety with even deeper red than Youkihi. Transparent scales reveal internal organs, further emphasizing redness. Pursuing the ultimate in red coloration.

Black body with Miyuki external light and blue lame. Jet-black body with glittering blue lame creates a mystical night-sky appearance.

Deep lapis lazuli blue body evokes the gemstone. Combined with external light, emits a mystical glow. Most beautiful in dark containers viewed from above.

Representative black-body improved medaka. Known for deep black body color with overwhelming presence from its jet-black Orochi lineage. Relatively easy to keep even for beginners.

Medaka with elongated dorsal, caudal, and pectoral fins. Developed by Matsui fish farm. Gracefully flowing fins are best appreciated from the side.

Elegant improved medaka with pale pink body color accented with orange-red. Delicate coloring evokes Japanese aesthetics. Particularly beautiful when viewed from above in white containers.

Transparent scales allow red, white, and black colors to appear like brocade fabric. Unique beauty with pigments floating in translucent body. Best viewed from above.

Beautiful modified medaka with red-orange body and external light. Named for the elegant glow like Princess Otohime of Ryugu Palace. Best appreciated from above.

Classic improved medaka with beautiful golden-shining body color. Body sparkles in sunlight, beautiful in tanks and outdoor containers. Easy to keep and suitable for beginners.