Max Size: 2.5cm

Celestial Pearl Danio (Danio margaritatus)

The vibrant colours and peaceful nature of the Celestial Pearl Danio make them extremely popular in the hobby. These fish are suitable for a nano or well-planted aquarium. However, these fish can be pretty shy, so it would be better to keep them in a quiet place and provide plenty of hiding places.

Celestial Pearl Danios are shoaling fish with rival males sparring regularly during the day. It's not unusual to see nipped fins within a group; however, this behaviour will not usually happen to other tankmates.

It would be best to keep these Danios in groups of 10 or more individuals. When more significant numbers are present, the aggression will be spread throughout the group rather than single individuals. In addition, the fish will become bolder, will be more often seen, and they will display much better colouration.

Ideal tank mates for these fish could include similarly-sized, surface-dwelling species and other small Cyprinids and microdevario species. However, it would be best to avoid housing them with larger or more boisterous tankmates as they will likely be intimidated or outcompeted for food.

Celestial Pearl Danios should ideally be kept in a heavily-planted setup with a dark substrate. Making sure you have broken lines of sight in the aquarium will allow your fish to display their natural behaviours and help reduce their skittishness. Floating plants are a helpful addition; however, driftwood and dried leaves are best avoided as the tannins they release are not a characteristic of its natural waters. These fish will require gentle filtration; an air-powered sponge filter would be more than adequate.

Celestial Pearl Danios have an unusual body shape compared to other fish of the same species. In addition, there are notable differences in the colours of the males and females. The males exhibit relatively bright blue body colouration with more colour in their fins. On the other hand, females exhibit duller bluish-greenish background colouration and have a yellowish tint on their bellies. In addition, both the males and the female bodies present small pearly dots.

Celestial Pearl Danio (Danio margaritatus) Video

Celestial Pearl Danios (Danio margaritatus) Freshwater Nano Aquarium Fish Profile & Care Guide


Celestial Pearl Danios
Celestial Pearl Danio
Celestial Pearl Danio
Celestial Pearl Danio
Celestial Pearl Danio
Celestial Pearl Danio
Celestial Pearl Danio
Celestial Pearl Danio
Celestial Pearl Danio
Celestial Pearl Danio
Celestial Pearl Danios
Celestial Pearl Danio
Celestial Pearl Danio
Celestial Pearl Danio
Celestial Pearl Danio
Celestial Pearl Danio
Celestial Pearl Danios
Celestial Pearl Danio
Celestial Pearl Danio
Celestial Pearl Danio
Celestial Pearl Danio
Celestial Pearl Danio
Celestial Pearl Danio
Celestial Pearl Danio
Celestial Pearl Danio
Celestial Pearl Danio
Celestial Pearl Danio
Quick Facts
Scientific NameDanio margaritatus
Year Described2006
Other NamesGalaxy rasbora, Fireworks rasbora, Rasbora toei, Chilli rasbora, Microrasbora
Aquarium LevelMiddle - Top
DifficultyBeginner - Intermediate
Best kept asGroups 6+
Lifespan3 - 5 years
Water Parameters
Water TypeFreshwater
PH6 .5 - 7.5
GH3 - 15
KH1 - 5
TDS100 - 500
68 - 78℉
20 - 25.6℃


In the home aquarium, the Celestial Pearl Danio will readily accept most good quality dried foods such as granules, flakes and sinking pellets. These modern food products have been developed to provide all adequate nutrition to maintain your fish's health and dietary requirements.

Providing additional foodstuffs such as live, frozen, and freeze-dried meals such as bloodworm, daphnia, and tubifex once or twice a week will provide additional benefits to your fish's health and well-being but is not a must for this fish.

It should be noted that bloodworms should only be given as an occasional treat and should not be used as the staple diet as they are difficult for fish to digest and can potentially cause blockages.

This fish is an omnivore in the wild, meaning it will consume some vegetable matter. Although most modern fish foods take this into account and include them in their products, you can still supplement your fish's diet with blanched vegetables such as spinach, broccoli, and zucchini. Ensure you do not overfeed your fish and remove any leftovers the following day.

Tank Mates

10 interesting tank mate ideas for the Celestial Pearl Danio could include:

Dwarf Spotted Danio(Danio nigrofasciatus)
Ginga Rubra Guppy(Poecilia reticulata)
Glowlight Danio(Celestichthys choprae)
Neon Green Rasbora(Microdevario kubotai)
Panda Corydoras(Corydoras Panda)
Phoenix Rasbora(Boraras Merah)
Siamese Dwarf Rasbora(Trigonostigma somphongsi)
Vietnamese Cardinal Minnow(Tanichthys micagemmae)
White Cloud Mountain Minnow(Tanichthys Albonubes)
Yellow Tiger Endler(Poecilia wingei / Poecilia reticulata)

Sexual Dimorphism

It is relatively straightforward to differentiate between male and female Celestial Pearl Danios. The males are thinner and often more vibrantly coloured and have a more orangy chest and the tail end of their bodies tend to be higher. In contrast, females are slightly duller and have a more rounded body shape.

Frequently asked questions

Are Celestial Pearl Danios a shoaling fish?

Contradictory to popular belief, Celestial Pearl Danios are not actual shoaling fish. While they enjoy spending time with each other, they also like to separate themselves from the rest and do their own thing. Thus, they tend to live independently once they get settled in their environment.

How big do Celestal Pearl Danios get?

Celestial Pearl Danios average out at about 2.5 cm in length once they are fully grown, which is typically around three months of age when they reach sexual maturity.

How long do Celestial Pearl Danios live?

With the correct conditions, Celestial Pearl Danios can live for around 3 to 5 years in captivity. However, there are several things that may affect their lifespan, poor water conditions and stress being the biggest.

What are the best tankmates for Celestial Pearl Danios

Celestial Pearl Danios do best with the same species of fish. However, suppose you want to house them with other fish species. In that case, suitable tankmates could include non-aggressive, similarly sized fish with the same temperament, such as Neon Tetras, Guppies, Endlers and Dwarf Gouramis. You can also house Celestial Pearl Danios with Shrimp and snails.

What should you feed Celestial Pearl Danios?

Celestial Pearl Danios are not fussy eaters, and their diets can vary significantly. In their natural habitat, these Danios will usually feed off algae, plants, plankton and small vertebrae as a source of protein.

In captivity, the fish will readily accept High quality commercially available flakes, granules or pellets; however, make sure they are of a suitable size as they have very tiny mouths. In addition to dried food, you should supplement their diets with live protein-rich food such as krill, daphnia, brine shrimp and grindal worms; these are are all excellent choices.

What size aquarium do you need for Celestial Pearl Danios?

The ideal aquarium size for Celestial Pearl Danios is 45 litres if you keep six or more individuals together. However, just because you can keep these fish in smaller tanks does not mean they will not welcome more room. If you have enough space and don't mind paying for a slightly bigger aquarium, it will improve their quality of life.

Other Danios of interest

Assam Danio(Devario assamensis)
Barred Danio(Devario pathirana)
Bengal Danio(Devario devario)
Black Barred Danio(Danio absconditus)
Blood Tailed Danio(Devario annandalei)
Blue Danio(Danio kerri)
View all Danios
Date Added: 20/05/2020 - Updated: 11/08/2022 15:00:11