Celestial Pearl Danio

Celestial Pearl Danio Care, Size, Tank Mates, and More

The Celestial Pearl Danio is a freshwater fish found in South East Asia’s small, vegetated ponds.

From the white pearl-like markings on their sides to the crimson color on their fins, these fish are vibrant.

Aquarium hobbyists have immediately adopted and fallen in love with these small Danios, which were discovered within the last decade.

They thrive in tanks with plenty of plants and other freshwater fish that imitate their calm demeanor. Although these fish are fearful, they thrive in communities with guppies, mollies, and tetras.

We’ll cover how to care for them, their recommended diet, reproduction, tank needs, and much more in this tutorial.

Fats & Overview of Celestial Pearl Danio

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Celestial Pearl Danio
Care Level:Medium
Color Form:White spots along the body with red coloration on the fins
Lifespan:3-5 years
Size:Up to 1 inch
Minimum Tank Size:10 gallons
Tank Set-Up:Freshwater: highly vegetated and shallow
Compatibility:Peaceful communities

When the Celestial Pearl Danio, sometimes known as the Galaxy Rasbora, was discovered in 2006, it shook up the aquarium world. This fish is incredibly popular due to its brilliant colors and tranquil attitude.

Danio margaritatus is the scientific name for this fish, which belongs to the Cyprinidae family. It’s a plant-feeding fish that provides a splash of color and a flurry of activity to any aquarium.

In stable aquariums, the Celestial Pearl Danio has a lifespan of 3-5 years.

Celestial Pearl Danios, despite their small size, may help to spice up any planted aquarium. Despite their timidity, they get along with a broad variety of other fish.

They’ll be continuously on the go, investigating the tank’s bottom levels.

Because of their small size and shy attitude, they should be housed in a community of fish that are similar in size and behavior. If they don’t, larger fish can easily feast on them or outcompete them.

Beginners who want to keep a school of Galaxy Rasboras should focus on their behavior and environment first and foremost.


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Celestial Pearl Danio

A swarm of tiny fish can liven up any plant backdrop by adding color and movement. The fish’s white-spotted bodies, paired with their red or orange fins, make them stand out in their environment.

These are little fish, measuring hardly more than 1 inch from head to tail.

The coloring of the fins is the most distinguishing feature of these fish. Depending on the sex, all fins feature two parallel black lines with vivid red or orange colors.

When looking at a bunch of these Danios, you’ll probably notice that they’re all different colors. This is due to sexual dimorphism, in which men and females have varied appearances.

Males are thinner and frequently have brighter colors, especially on the tail, whilst females are duller and rounder in appearance.

Males that are courting will develop a deeper red coloring on their stomachs. This color can lead to people just looking for males for their tanks; unfortunately, maintaining a healthy ratio of males to females is critical.

Males will always fight for mates, thus having more females than males will reduce the likelihood of fighting.

Because they are such a novel species, there are still debates regarding where they belong in the Cyprinidae genus. They are similar in shape to other members of their family, and they even have the spotted pattern of other danio fish, such as the dwarf danio fish (Danio nigrofasciatus).

Tank Requirements and Habitat

The Celestial Pearl Danio is a freshwater fish found in South East Asia’s small, densely vegetated shallow ponds (Myanmar).

The water velocity in these ponds is minimal, yet there is a lot of light. The light encourages the growth of flora and algae, which they can use to hide and feed on.

This fish does best in the natural when it is surrounded by a lot of live foliage and other hiding places (rock or driftwood).

It’s also worth noting that there’s still a lot to learn about their environment and species as a whole. Because it was found in 2006, further discoveries are anticipated.

Tank Conditions

You’ll need a lot of plants buried on a dark substrate to mimic their native environment within your tank.

They are used to a wide array of aquatic plants because their natural habitat is primarily tiny ponds. These plants not only keep the tank clean, but they also provide a hiding place for the fish and even let them to lay eggs.

As the number of males in your tank grows, these hiding spots will become increasingly crucial. Males are continuously competing for mates, and without places to hide, losing males are subjected to excessive harassment, which often results in injury and death.

You should also put a lot of rocks and driftwood to help them feel like they’re in their natural habitat.

The optimal temperature for these fish is between 73 and 79 degrees Fahrenheit. The ideal pH level is between 6.5 and 7.5. It is vital to keep the hardness at a mild to medium level.

Because of how tough these fish are, these levels are a touch wide. What matters most is that these fish are kept in water with consistent conditions.

They don’t require a constant flow of water because they are accustomed to slow-moving or stagnant waters. Maintain a moderate to a high level of lighting.

Aquarium Size Requirements

Nothing less than 10 gallons should be utilized for keeping Celestial Pearl Danio in a tank. Given their gathering nature, keeping 5 or 6 individuals, mostly females if possible, is the best way to go.

If you want to keep more of them, a larger tank will be required. Aim for 2 gallons of water per fish.

Also, try to keep the tank as shallow as possible. This will make the fish feel more at ease because it will simulate the shallow aspect of their natural habitat.

Tank Mates

Because of their shy character, it’s vital to keep them among other fish of similar size and temperament. The Celestial Pearl Danio will be able to avoid being eaten by larger fish or being outcompeted by faster, more aggressive fish as a result of this.

They’re shy, but that doesn’t mean they’re not calm and adapt well to small groups: tetras, guppies, Corydoras, and killifish make excellent tank mates. All of these fish are relatively quiet, which will go well with the Galaxy Rasbora’s bashful temperament.

The neon tetra is an excellent example of a complementary fish. They prefer to linger near the surface and add a splash of color to the neighborhood. With Tetras on top, the entire water column will be brimming with fish.

Fish from the same species or region make excellent tank mates since they exhibit similar behaviors.

Keep in mind that these fish are known to assault and eat young shrimp. However, if you have larger, adult shrimp, you shouldn’t be concerned. Shrimp are usually left alone once they reach adulthood.

When you combine numerous types of schooling fish, you’ll need more gallons of water per fish. If you have a smaller tank, keep this in mind.

Celestial Pearl Danio can be used with a wide variety of fish as long as they are tranquil. This is why these fish are ideal for calming community tanks.

Cichlids, Oscars, and Jack Dempseys are aggressive fish that will eat fish that are slower and smaller than them, so stay away from them.

Keeping Celestial Pearl Danios Together

Celestial Pearl Danios prefer to be in groups, so try to maintain a group of 5 or 6 together to keep them healthy and active.

However, if your tank is small, keep an eye on the number of males you have. Males who are less dominant will be attacked by other males in a small tank with few hiding areas.

To keep everyone safe, make sure there’s enough room for the fish to live and a good male-to-female ratio. Many plants will give them a natural feel, as well as provide males with an excellent hiding area when competing for ladies.


These fish eat a variety of algae, plants, and zooplankton in their natural habitat. They’ve also been known to devour worms and small invertebrates. Because these fish are largely opportunistic eaters, their diet is quite diverse.

However, in an aquarium, these fish will eat dry food like flakes and pellets as long as it is small enough to fit in their mouth.

Feeding can be difficult if they are afraid to eat. Use sinking pellets because these fish will most likely dwell in the bottom half of the aquarium.

Small live or frozen food, such as brine shrimp or krill, is another alternative for feeding. The krill, in particular, will aid in the reddening of the fins. White worms are an inexpensive option.

Live Daphnia, Grindal Worms, and Moina are all good sources of nutrition for these little fish.

Always remember to rotate the food they consume. Make an effort not to serve them only one sort of food (i.e. only pellets). As long as they eat the correct foods, this will keep them healthy and even more vibrant.

General Tip

When feeding any tank or fish, keep an eye on the tank and study each fish’s feeding habits. You’ll learn a lot about people, which will help you feed them more efficiently.

Regardless of the species, some people will be shy and others will be fearless. It’s critical to get to know your individual fish so you can cater to their specific demands.

This reduces the amount of waste in the tank, which means less cleaning and time spent by you in the long run.

It’s critical to keep a watch on your tank’s fish to ensure that they aren’t being out-competed for food.

If this occurs, you should consider modifying the manner you feed your fish. Instead of feeding them all at once, feed the quicker fish on one side and let the food sink down to where they’re hiding on the other.


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Celestial Pearl Danio

It’s critical to maintain a tight eye on these fish from the outset, as it is with other species.
Males wooing ladies is something to keep an eye out for.

Males devote a significant amount of time to courting females. As a result, men compete for potential mates.

Torn fins and other indicators of bite marks on the sides of fish are an easy method to tell whether they’re fighting. Male fighting is not only awful for the loser, but it can also cause Fin Rot if the fins are damaged.

Fin rot is a very common problem in aquarium fish, and it’s caused by poor water quality and, yes, previously injured fins. But, thankfully, there are numerous ways to treat and prevent this from occurring.

If you notice a fish with this sickness, make sure to increase the number of water changes you do. Antibacterial drugs including Oxytetracycline, Tetracycline, and Chloramphenicol can help diseased fish survive.

Always keep an eye on the pH and temperature of the tank’s water. If these aren’t in the right range, the fish will be stressed, which can lead to Fin Rot.

Another thing to bear in mind is the common misperception that they are true schooling fish. When aquarists observe these fish grouped together, they often mistake it for schooling.

While Celestial Pearl Danio groups will stick together, for the most part, they will eventually split up, especially after getting to know their new habitat.

The difference in schooling behavior can be seen in a real schooling species like a Neon Tetra.


Breeding is a rather simple process. Female fish with a rounder abdomen and darker coloration are the ones to look for. This indicates that she is ready to reproduce.

Due to their natural habitat, the use of live feeding has been shown to boost spawning in some situations.

Egg layers are Celestial Pearl Danios. She’ll usually lay the eggs where there’s less water movement, but they can turn up anywhere.

Females can lay up to 30 eggs at a once, but groups of around 12 are more common. The eggs will incubate for 2-4 days before entering their larval stage and beginning to swim. If you find the eggs early on, you must extract them and place them in a breeding tank. Males are continuously on the lookout for eggs to consume.

With vegetation and low to medium water flow, the breeding tank should be set up identically to the main tank.

For the first week, start by feeding them micro foods. You can then go on to baby brine shrimp until they reach adulthood.

The fry develops adult color and size within the first year, indicating that they are growing quickly.

Is the Celestial Pearl Danio Right for your Aquarium?

Pearl of the Gods Danios is resilient fish that thrive in peaceful environments. Since they were discovered 12 years ago, their vivid colors and tendency to gather have helped to brighten up tanks.

Are these fish right for your aquarium?

Yes, if you have a large, heavily vegetated tank (more than 10 gallons) and are willing to observe how your fish eat and live together. These fish offer a lot of color to the environment and work well with other species.

Consider other species that are easier to keep, such as Guppies or Tetras, if your tank is small or lacks greenery.

Starting with these fish will allow you to develop the necessary knowledge base to progress to more difficult fish.

The Final Word

There’s a lot to enjoy about the Celestial Pearl Danio, as you can see. These fish provide a special kind of elegance to any freshwater tank, and we’ve long admired them.

If you’re thinking about obtaining a Galaxy Rasbora, we strongly advise you to do so. They’re a lot of fun to watch and maybe cared for by people with a variety of levels of skill.

Keeping these fish is simple as long as you follow the care instructions in this article.

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