Orange Medaka Ricefish (Oryzias latipes) mixed grade

Black Medaka Ricefish (Oryzias latipes) — Mixed Grade

Elegant, peaceful, and surprisingly captivating, the Black Medaka Ricefish is a jewel of the nano aquarium world. With their deep, velvety black colouration and graceful, shimmering movement, a small school of these fish transforms any planted tank into a living work of art. Our mixed grade listing offers a selection of fish with varying degrees of black pigmentation — from rich charcoal to near-solid jet black — making each tank uniquely your own.

Originally from Japan and East Asia, Medaka (Japanese Ricefish) have been selectively bred for centuries, and the Black variety remains one of the most sought-after strains among nano fish enthusiasts and aquascapers alike.

Highlights

• Striking black colouration — deep, velvety pigmentation that contrasts beautifully against green plants and light substrates
• Mixed grade — assorted intensity of black colouration; great value for planted tanks and breeding projects
• Ideal nano fish — small, active, and peaceful; perfect for tanks as small as 10 gallons
• Hardy & beginner-friendly — tolerates a wide range of water parameters and temperatures
• Surface schooling behaviour — mesmerizing to watch as they glide near the waterline in a coordinated group
• Easy to breed — females carry egg clusters and attach them to plants; fry are easy to raise

Care Guide

• Tank size: 40 L (10 gal) minimum; larger for groups of 10+
• Temperature: 18–28°C (64–82°F) — highly adaptable; can tolerate cooler temps
• pH: 6.5–8.0
• Diet: Micro pellets, crushed flake food, baby brine shrimp, daphnia; not fussy eaters
• Tankmates: Peaceful community fish, shrimp, snails; avoid large or aggressive species
• Décor: Floating plants (frogbit, water lettuce) and fine-leaved plants encourage natural behaviour and provide spawning sites
• Lighting: Moderate; enhances the depth of their black colouration

About Mixed Grade

Mixed grade fish are selected from our breeding stock and include individuals with varying levels of black pigmentation. While not show-quality, they are healthy, vibrant fish that are ideal for community tanks, breeding programs, or hobbyists looking to enjoy this beautiful strain at accessible pricing. Colouration may deepen with age, diet, and optimal water conditions.