Pearl Medaka – Shinju

The Pearl Medaka Shinju (Oryzias latipes), a selectively bred variant of the Japanese rice fish, is admired for its soft iridescence and pearl-like body. Native to East Asia, this hardy species has gained popularity among aquarists for its adaptability, peaceful temperament, and elegant appearance. The Pearl Medaka Shinju thrives in both indoor aquaria and outdoor tubs, making it a versatile choice for aquascapers and breeders alike. Their gentle behavior and small size make them ideal for nano aquariums and community tanks with equally peaceful inhabitants.

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Features of a Pearl Medaka Shinju

• Grows up to 3.5 cm in length

• Semi-transparent body with a subtle pearlescent shimmer

• Peaceful, shoaling behavior; best kept in groups of 6 or more

• Hardy and adaptable to a wide range of water parameters

• Lifespan of 2 to 4 years

• Exhibits surface-oriented swimming and breeding behavior

The Best Aquarium Size for Pearl Medaka Shinju

A tank of 20 litres or more is sufficient for a small group of Pearl Medaka Shinju. While they tolerate confined spaces well, providing a longer horizontal swimming area enhances natural behavior and coloration. Outdoor tubs and ponds are also suitable in mild climates.

Nice tank brands you can consider:

• Yiding Tanks
• Aqua One Tanks
• Fluval Aquariums
• Oceason Aquariums

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Tank Mate Compatibility for Pearl Medaka Shinju

These medaka are peaceful and do best with similarly small, non-aggressive species. Suitable tank mates include:

• Pygmy Corydoras
• Ember Tetra
• Amano Shrimp
• Celestial Pearl Danio

Diet for Pearl Medaka Shinju

Pearl Medaka Shinju are omnivorous and benefit from a varied diet. Feed high-quality micro pellets, crushed flakes, and occasional live or frozen foods such as baby brine shrimp, daphnia, and microworms. Multiple small feedings per day help support growth and vibrant coloration.

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Aquarium Setup for Pearl Medaka Shinju

Aquarium Filtration

Use a sponge or gentle internal filter to maintain clean water without creating excessive flow. These fish prefer calm surface conditions.

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Aquarium Plants

Live plants such as Java Moss, Hornwort, and Floating Ferns provide cover and enhance breeding. Dense planting also reduces stress.

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Aquarium Lighting

Moderate lighting highlights their pearlescent tones and supports plant growth. Avoid overly intense lighting.

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Aquarium Heating

Maintain water temperature between 2026C. A heater is recommended in cooler climates, especially during winter.

Aquarium Substrate

Fine sand or smooth gravel is ideal. While they spend most of their time near the surface, a natural substrate enhances biological filtration.

A variety ofSubstratesare available at Coburg Aquarium.

Aquarium Decorations

Include gentle decorations like driftwood, moss-covered stones, and floating plants. Avoid sharp edges and maintain open swimming areas near the top.

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