Velvet Medaka Ricefish (Oryzias latipes) mixed grade

Velvet 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 matt silver — 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 Slight yellow colouration on the heads 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.