/Celestial Pearl Danio : A Complete Guide About the Celestial Pearl Danio

Celestial Pearl Danio : A Complete Guide About the Celestial Pearl Danio

Main image Celestial

The scientific name of the celestial pearl danio is Danio margaritatus. It is also known as “Galaxy Rasbora”. It’s a member of the Cyprinidae family. It belongs to the Cypriniformes order and Chordata Phylum. They are popular nano aquarium fish. The celestial pearl danio is a wonderful freshwater fish. It is mostly found in the highly vegetative and shallow ponds of SouthEast Asia. This fish mostly loves to live in the lower portions of the aquarium.

This amazing fish adds blends of beautiful colors and lively activity to the aquarium. Its beautiful colors and peaceful nature make this fish perfect for aquariums. The estimated life span of the celestial pearl danio is three to five years in a stable tank. Although they are small in size they can live happily and peacefully with those fish whose behavior and size resemble them. They should never keep with large fish because those fish can easily prey on this little creature or can compete with them for food. They do best in large groups and these fish do not get aggressive with other fish in the tank. They seem to do well with small dwelling fishes well. They stay together in a group for social reasons; males may quarrel with each other but normally they have a peaceful nature.

How is their Appearance?


The celestial pearl danio has plenty of amazing colors, with white pearl-like spots on the body. It has a blend of red and orange coloration on its fins. This fish is small in size and it can grow up to one inch only from head to tail. When they are moving in groups you will see a difference in colors of these fish, this difference in colors is because of sexual dimorphism in them.

The males are usually thin and have more sharp colors, on their tail and fins. Males also have additional dark red color on their stomach and they spark constantly. Another great difference is in their body shape; males have slender like the body; whereas, females have a little bit of dull colors and are more round in shape. The belly of females is orange in color and ventral fins are clear. When females fish are about to spawn; there becomes a dark spot, in front of the anal fin and this area is swollen a little bit. These differences can help aquarists to seek out male and females in their aquariums.

It is important to keep an equal ratio of males and females in the tank for a healthy and peaceful group. The chances of fighting males for mates will decrease when there is an equal ratio of males and females.

The Habitat of the Celestial Pearl Danio

Habitat - Celestial-Pearl-Danio

The celestial pearl danio is native to SouthEast Asia. They come from waters of a very small area of Hopong east of Inle Lake of Myanmar. This area is mostly grassland and rice paddies, and ponds receive a good amount of sunshine in summer. In the wild, they are found in relatively low water movement with bright light. In the aquarium, the water should have a low amount of dissolved organics, carbonates, and nitrates. You will mostly find them in lower portions of your aquarium.

The Feeding of the Celestial Pearl Danio

celestial pearl danio breeding

The celestial pearl danio is omnivorous and they eat very small organisms like zooplankton and algae. They are not surface eaters so you probably have better luck with sinking food. Since they are very small in size it is important to give them food that fits in their mouth.

They have tiny mouths and also have pharyngeal teeth like all other cyprinids. They also have conical teeth which indicate that they do prey on tiny invertebrates. We will recommend you to feed your fish a good quality of finely crushed flakes, finely grounded dried krills, little shrimp babies, and other foods like daphnia, little white worms, and good quality of micro pellet food.

Breeding in the Celestial Pearl Danio


Many successful cases have reported about the breeding of the celestial pearl danio. Look for a female that is darker in color and has a swollen abdomen which shows that the female is ready for spawning.

It has been noted that the use of live food stimulates spawning in a few cases due to their natural climate. Mostly this fish prefers those areas where the movement of water is less but can appear at any place. The celestial pearl danio usually lays less than a dozen eggs, and it has also reported that some species lay up to thirty eggs in a single spawning. Its eggs are clear and a little bit adhesive and fall into the bottom of the aquarium quickly.

The male chases the females’ other species, but often spawning does not happen because of this chasing. When actually spawning happens the male mop or hovers over the plant. It is to display a red flash.  The female will also move towards male if she is ready to spawn and dive into the spawning medium together and after releasing eggs they move to separate ways. Fish that are not spawning can eat any eggs they find.

Raising the babies of the Celestial Pearl Danio

Celestial-Pearl-Danio-Raising babies

The eggs require a minimum of three days to hatch at 76 F or a maximum of five days to hatch at 70 F. The color of the newly hatch fry is dark and they spend their time at the bottom. They do not move and some of the breeders think that they are dead. After two to four days or a week, the fry will start swimming and it also depends on temperature.

At this stage, it is important to feed them. In the early few days, it is important to feed them with micro-organisms like paramecia, commercial liquid, and grounded dry foods. After feeding micro food for about a week start feeding them with newly hatched brine shrimp. Then after some day’s start feeding them a variety of foods like Walter worms, baby shrimps, etc.

The growth is rapid in them. After nine to ten weeks, they begin to take adult colorations and at the age of 11 to 12 weeks, they are fully grown. And at this stage reproduction is started in them and in this way a cycle is repeated in these fish.

Celestial Pearl Danio size

The estimated size of this fish is about one inch in size when fully grown. At the age of three months, this fish reaches its maximum size and it is also sexually mature.

Tank Size for the Celestial Pearl Danio


The suitable size of the tank is 10 gallons for a group of six fish. As the celestial pearl danio is schooling fish, so always keep them in a group of six. If you want to keep more than six fish then tank size should be greater than 10 Gallons.  We will also recommend you keep the aquarium shallow just like their natural homes. In this way, fish will be more comfortable and happy.

Aquarium and growing conditions 

Celestial-Pearl-Danio-aquarium conditions

You should grow plenty of trees inside the aquarium to create a replica of their natural environment. In their natural environment, there is variety and plenty of aquatic plants. So, it is best to grow aquatic plants in the aquarium, because these plants not only help to keep the tank clean but these plants also give a beautiful environment to fish not only to play but also to lay eggs!

We also recommend you keep rocks, stones, and driftwoods to give it the appearance of their natural homes. The best temperature for these fish is between 73 to 79 F. The recommended pH is between 6.5 to 7.5. The recommended hardness of water is between soft to medium level. The celestial pearl danio is hardy and can survive if little deviations take place in these conditions. But, what is important is to keep stable water conditions. The number of nitrates, nitrites, ammonia, carbonates should not exceed!

How is their temperament?


The celestial pearl danio has a cool and peaceful nature. They are schooling fish so always keep them in a group of six in a tank of ten gallons.  They always live in the form of groups and live peacefully. Males sometimes quarrel with each other and even with the females but mostly they all have a peaceful temperament.

So, you can keep them with any fish, but it is recommended to keep them with little fish and never keep them with larger fish because these larger fish can attack them and can cause harm to these little fish.

Care of the Celestial Pearl Danio


It is important to keep a close eye on The Celestial Pearl Danio from the start. Males spent a lot of time courting females.  This can lead to a fight between males and females. As we know that males sometimes show aggressive behavior so they can even tear fins of females and sometimes bite marks can also be noticed on the sides of fish.

Fins rot is a common issue in-tank fish and this issue can be further enhanced by the poor quality of water. But don’t worry there are many ways to cure and prevent this problem from happening. If you find your fish suffering from this problem, increase the number of water changes. You can also use antibacterial medicines to cure them.

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