Blue Diamond Rice Fish (Oryzias latipes)

Blue Diamond Rice Fish is likely a selectively bred variant of the Japanese Rice Fish (Oryzias latipes) or closely related species like Oryzias woworae (Daisy’s Blue Ricefish). While not a standardized scientific name, “Blue Diamond” typically refers to a shimmering, iridescent blue coloration that resembles a gemstone-like sparkle.

Blue Diamond Rice Fish (Oryzias sp.)

 Appearance

• Color: Intense metallic blue body with a diamond-like shimmer.
• Size: 1.2–1.6 inches (3–4 cm).
• Sexual Dimorphism: Males are slimmer and more colorful; females are rounder, especially when gravid.

 Tank Setup

• Tank Size: 5–10 gallons minimum for a small group.
• Water Parameters:
  • Temperature: 64–78°F (18–26°C)
  • pH: 6.5–8.0
  • Hardness: Moderate
• Aquascape: Planted tank with floating plants and gentle flow. Dark substrate enhances their coloration.

 Behavior & Compatibility

• Temperament: Peaceful, active, and social.
• Best Kept In: Groups of 6 or more.
• Tank Mates: Other peaceful nano fish, shrimp, or snails.

 Diet

• Feeding: Omnivorous.
  • Micro pellets
  • Crushed flakes
  • Live/frozen foods like daphnia or baby brine shrimp

Breeding

• Method: Egg scatterers; females carry eggs on their vent before depositing them.
• Ease: Very easy to breed in clean, stable water.
• Fry Care: Remove adults or eggs to prevent predation.