Description
Galaxy Rasbora / Celestial Pearl Danio (Danio margaritatus)
📌 Basic Info
Scientific Name: Danio margaritatus
Common Names: Galaxy Rasbora, Celestial Pearl Danio (CPD)
Size: ~1 inch (2.5 cm)
Lifespan: 4 – 5 years
Tank Zone: Middle to bottom swimmers
🌊 Water Parameters
TDS (Total Dissolved Solids): 100 – 200 ppm
pH: 6.5 – 7.5
Temperature: 22°C – 27°C (72°F – 80°F)
Water Type: Clean, well-filtered, slightly soft water
🐟 Characteristics
Stunning blue body with white “pearl-like” spots
Red or orange fins (males brighter than females)
Peaceful but a little shy – shows best colors in planted tanks
Perfect centerpiece fish for nano aquariums
🍽️ Food
Type: Omnivorous
Diet: Micro-pellets, crushed flakes, frozen/live foods (baby brine shrimp, daphnia, bloodworms)
Feeding Frequency: 1–2 times daily in small amounts
🛠️ Maintenance
Weekly water change: 25–30%
Provide live plants, rocks, and hiding spots
Gentle water flow – avoid strong currents
Stable water quality is very important
👥 Social Behavior
Minimum Group Size: 6 (better in 10–12 for natural behavior)
Tank Mates: Peaceful nano fish – rasboras, small tetras, shrimp, snails, corydoras
Avoid: Aggressive or fin-nipping fish, and anything too large (they are shy and small)
✅ Do’s
Keep them in groups for confidence and bright colors
Add plants and caves for shelter
Use gentle filtration and stable water conditions
❌ Don’ts
Don’t keep with big/aggressive fish
Don’t keep in small groups (they will hide and lose color)
Don’t expose them to sudden temperature or water changes
⭐ Quick Tips
One of the most beautiful nano fish for aquascapes
Best in planted community tanks with calm tank mates
Males are brighter, females are rounder (good for breeding setups)
