Celestial Pearl Danio

• ExerciseModerate

  An active swimmer that appreciates open swimming space.

• GroomingEasy tank upkeep

  No grooming here — steady water quality and routine tank care do it.

• Living spaceNano-tank friendly

  Happy in a small, stable, well-filtered tank.

• Owner experienceSome experience helps

  A little know-how makes life smoother.

• Commitment3–5 years

  Plan for a long, loving relationship.

Health to watch: Ich (white spot) · Fin rot · Skin conditions

The celestial pearl danio (Danio margaritatus), also called the galaxy rasbora, is a tiny cyprinid discovered as recently as 2006 in small, spring-fed ponds near Hopong in Myanmar (Burma). It reaches only about 2 cm and lives 3–5 years. Its deep blue body is scattered with pearly spots, and its fins are barred in orange-red, most vivid in males. Being so small and initially shy, celestial pearl danios thrive in a densely planted tank of 40 litres or more kept in a group of eight or more. Recreate their cool, hard-water home at 20–26°C with a pH of 6.5–7.5, providing fine-leaved plants, mosses and gentle filtration. Ample cover coaxes out their colour and confidence. They are micro-omnivores needing small foods such as crushed flake, micro-pellets and live or frozen baby brine shrimp and daphnia. Peaceful and well suited to nano and shrimp tanks, they may squabble mildly among males but rarely trouble other fish. Sensitive to poor water, their main risks are ich and stress-related illness, prevented by a stable, mature, well-planted tank.

• How active is a Celestial Pearl Danio?

  Moderate. An active swimmer that appreciates open swimming space.

• How much maintenance does a Celestial Pearl Danio need?

  Easy tank upkeep. No grooming here — steady water quality and routine tank care do it.

• What tank size does a Celestial Pearl Danio need?

  Nano-tank friendly. Happy in a small, stable, well-filtered tank.

• Is a Celestial Pearl Danio a good fit for first-time owners?

  Some experience helps. A little know-how makes life smoother.

• How long do Celestial Pearl Danio live?

  3–5 years. Plan for a long, loving relationship.

• What health issues affect the Celestial Pearl Danio?

  Keep an eye out for Ich (white spot), Fin rot, Skin conditions. These are worth raising with your vet, along with any screening they recommend.

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