Celestial fishes are popular nano fishes. As they require plants in the
tank, the coloration of the fishes gives a good look to the tank. Hence
they are a good choice for fish hobbyists

Why need a beginner’s guide for Celestial pearl fish? Celestial pearl fish is gaining popularity among planted aquarium hobbyists and it is essential to know the basics to upkeep these stunning beautiful planted tank fishes

Celestial Pearl Fish – Overview

Common NameGalaxy Rasbora
Scientific NameDanio margaritatus
Habitat or OriginThey originate from South east Asia – Myanmar
Average SizeThey grow up to one inch in size.
ColorationThe body of the fish is blue and have white spots that look
like pearl and fins are red-colored
Life SpanOn average, they live up to 3 to 5 years
DietThey can diet on pellets and flakes. Sometimes they can be
given white worms, krill, Grindal Worms, brine shrimp
Gender IdentificationThe males are brighter but smaller in size whereas the females are duller and rounder than males.
BehaviorThey are peaceful fishes. However, males do not get along
with each other. They tend to be explorative in groups. Later
when they become comfortable in the tank, they are happy
CompatibilityThey are small fishes hence cannot be accompanied by
larger fishes as there is a danger of being eaten up. Hence
smaller and other peace-loving fishes like Guppies, Killifish,
Corydoras, Tetras can be good tank mates. Females can be
together but male fishes are not compatible with each other.
Ideal Tank ConditionsThe tank should be freshwater. Plenty of plants and rocks in the
the aquarium is advisable as it resembles their natural habitat.
The size of the aquarium can be 10 gallons in minimum as
these are small fishes. Shallow tanks can give them more
Water ParametersThe temperature could be around 73-78 degree F. pH level
can be between 6.5-7.5
BreedingThe female becomes rounder when they are ready to lay
eggs. They lay about 30 eggs at a time. It takes 2-4 days to
incubate. But the eggs should be kept away, preferably in
the breeding tank as the males tend to eat the eggs.
Common DiseasesFin rot can happen due to fishes fighting or poor water quality
Approximate CostThey cost an average of 8 USD to 10 USD depending on the size and in southeast Asia/India they cost almost 1/3rd of the price
What to look when buyingCheck if the fins are proper without damage
Species in the MarketYellow danio fish, blue danio fish

Gallery of Celestial pearl fish


  1.  Vishwanath, W. (2012). Danio margaritatusIUCN Red List of Threatened Species2012: e.T168409A1186232. doi:10.2305/IUCN.UK.2012-1.RLTS.T168409A1186232.en.
  2.  Roberts, Tyson R. (February 2007). “The “celectial pearl danio”, a new genus and species of colourful minute Cyprinid fish from Myanmar (Pisces: Cypriniformes)”(PDF). The Raffles Bulletin of Zoology55 (1): 131–140.
  3. Conway, Kevin W.; Chen, Wei-Jen; Mayden, Richard L. (2008). “The “Celestial Pearl danio” is a miniature Danio (s.s) (Ostariophysi: Cyprin- idae): evidence from morphology and molecules” (PDF)
  4. Fang, F.; Norén, M.; Liao, T. Y.; Källersjö, M.; Kullander, S. O. (2009). “Molecular phylogenetic interrelationships of the south Asian cyprinid genera DanioDevario, and Microrasbora (Teleostei, Cyprinidae, Danioninae)”. Zoologica Scripta38 (3) 10.1111/j.1463-6409.2008.00373.x