Opaline Medaka 2.5cm

The Opaline Medaka (Oryzias latipes var.) is a mesmerising Japanese rice fish displaying a soft, milky-white to pale iridescent body with a gentle opalescent sheen that shifts between blue, green, and pink tones depending on the angle of light — much like the play of colour in a precious opal gemstone. Subtle yet captivating, the Opaline variety is a favourite among medaka enthusiasts who appreciate understated elegance and the quiet beauty of iridescence over bold colour. At 2.5cm, their characteristic shimmer is already clearly visible.

Care Guide

• Tank Size: Minimum 20L; best kept in groups of 6 or more
• Water Parameters: pH 6.5–8.0 | Temp 18–28°C | Adaptable to a wide range of water conditions
• Diet: Omnivorous — quality micro pellets and flake food; supplement with frozen or live daphnia, brine shrimp, and micro worms
• Temperament: Peaceful; excellent community fish — compatible with other small, non-aggressive species
• Tank Setup: Planted aquarium or outdoor tub with floating plants; dark substrate and angled lighting best showcases their opalescent shimmer
• Skill Level: Beginner
• Max Size: 4cm