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Live fish will be delivered only to selected pincodes in Kolkata and nearby areas.

The Galaxy Rasbora, more accurately known as the Celestial Pearl Danio (Danio margaritatus), is a small, stunning freshwater fish famous for its galaxy-like coloration. With shimmering spots and bright orange fins, it's a favorite in nano aquariums and planted tanks.


🐟 Overview

Feature Details
Common Name Galaxy Rasbora, Celestial Pearl Danio (CPD)
Scientific Name Danio margaritatus
Family Cyprinidae (carps and minnows)
Origin Myanmar (Lake Inle region)
Discovered 2006 (a very recent aquarium addition)
Type Small, peaceful schooling fish
Lifespan 3–5 years
Size 0.8–1 inch (2–2.5 cm)
Conservation Previously overfished; now mostly captive-bred

🌌 Appearance

  • Body Color: Iridescent dark blue to greenish-black

  • Spots: Creamy-white or gold, resembling stars on a night sky (hence "galaxy")

  • Fins: Males have bright orange-red fins with black edging; females are paler

  • Sex Differences:

    • Males: Slimmer, more colorful with vivid fin markings

    • Females: Rounder belly, duller coloration


🧬 Behavior & Temperament

  • Temperament: Peaceful but shy

  • Social Structure: Schooling – best kept in groups of 6–10+

  • Tank Level: Mid to lower swimmers

  • Male Behavior: Mild territorial displays; males flare fins and “dance” during courtship


🏠 Tank Requirements

Parameter Ideal Range
Tank Size Minimum 10 gallons for a group
School Size 6 or more (10+ better for natural behavior)
Water Temperature 72–78°F (22–26°C)
pH Range 6.5–7.5
Water Hardness Soft to moderately hard (3–12 dGH)
Filtration Gentle flow; sponge or low-flow filter
Substrate Dark substrate enhances colors
Décor Dense plants, moss, driftwood, hiding spots
Lighting Moderate to low (reduces stress and enhances color)

These fish are sensitive to water changes and poor water quality—stable parameters are key.


🍽️ Diet

  • Type: Omnivore (micro-predator in nature)

  • Best Foods:

    • High-quality micro pellets or nano flakes

    • Frozen/live: baby brine shrimp, daphnia, microworms, grindal worms

    • Occasional vegetable matter: spirulina flakes, crushed algae wafers

Feed small portions 1–2 times daily. A varied diet enhances color and breeding behavior.


🤝 Tankmates

Compatible Tankmates Avoid
Small rasboras, chili rasboras Large or aggressive fish (e.g. cichlids)
Corydoras catfish (especially pygmy types) Fast, boisterous fish
Shrimp (e.g. cherry, amano) Betta (may attack or be attacked)
Otocinclus catfish Anything that could see them as food

CPDs thrive in peaceful community tanks with soft water and gentle companions.


❤️ Health & Lifespan

Common Issues Prevention/Treatment
Stress from shipping Buy from local breeders or reputable sources
Ich (white spots) Quarantine new fish; raise temperature & treat
Fin rot Clean water and avoid nippy tankmates
Bloating Avoid overfeeding; include fiber in diet
  • Lifespan: 3–5 years with proper care


🥚 Breeding

  • Breeding Type: Egg scatterers

  • Breeding Behavior:

    • Males court females with fin-flaring displays

    • Females scatter eggs over fine-leaved plants or moss

  • Spawning Tips:

    • Use a separate breeding tank (5–10 gallons)

    • Add Java moss or spawning mops

    • Keep 1–2 males with 2–3 females

  • Egg & Fry Care:

    • Adults may eat eggs—remove parents post-spawning

    • Eggs hatch in ~3 days; fry swim freely after 2–3 more

    • Feed fry infusoria or powdered food, then baby brine shrimp

CPDs breed readily in aquariums but fry are tiny and delicate.


✅ Pros & Cons

Pros Cons
Stunning coloration and peaceful behavior Shy and easily stressed
Great for nano tanks and planted setups Not suitable with large or boisterous fish
Easy to breed in captivity Fry require specific care and feeding
Compatible with shrimp Sensitive to unstable water conditions

📌 Quick Summary

Trait Info
Size ~1 inch (2.5 cm)
Lifespan 3–5 years
Tank Size 10 gallons minimum
Temperature 72–78°F (22–26°C)
Behavior Peaceful, shy, schooler
Breeding Easy to breed, egg scatterers
Best Setup Planted, low-flow nano aquarium

🌱 Ideal Tank Setup

  • Tank: 10–20 gallons

  • Substrate: Dark gravel or sand

  • Plants: Java moss, Anubias, Rotala, Pogostemon

  • Filtration: Sponge filter or gentle HOB

  • Light: Low to moderate (subdued)



We process orders on all weekdays (Monday to Saturday), excluding public holidays.

To avail free shipping, purchase amount should be Rs350/-(for Aquarium Accessories and Aquatic Plants) or more, less than the above amount shipping charges applicable Rs70/- only. For live fish delivery charges applicable at the time of checkout.

Orders are normally Shipped within 1-2 days and usually take 2-5 working days to be delivered based on your location. However, you will receive an approximate timeline when you place your order.

To ensure that your order reaches you quickly and in good condition, we only ship through reputed courier agencies.

Let us know abour your query!