Celestial Pearl Danio(Galaxy Rasbora): Full Care Guide

The Celestial Pearl Danio is also known as the Galaxy Rasbora. They are freshwater fish found in small, vegetated ponds in South East Asia. This fish will add a splash of colour to your tank. The care level is easy to moderate, so beginner aquarists can keep them. They are peaceful fish, perfect for a community tank with Guppies, Mollies, and Tetras.

In this guide, we will discuss, how to care for them, their diet, habitat, tankmates, and more…

Care Level: Medium.
Colour Form:White Spots Along the body with red colouration on the fins.
Lifespan:3-5 Years.
Size:Up to 1 inch.
Minimum Tank Size:10 gallons.
Tank setup:Freshwater; Highly vegetated and shallow.
Compatibility:Peaceful communities.

Overview of Celestial Pearl Danios

The Celestial Pearl Danios are timid but they get along with a wide range of other fish. They are bottom dwellers, so they spend most time exploring the lower portions of the tank.

They have unique look. Because of their unique looks, these fish becomes highly popular in the aquarium industry. The demand for this fish is so high, which led to a rapid decline in the wild population. At that time the whole species was in danger. The breeders were able to start breeding the fish in captivity around 2008. The wild population has since stabilized.

The Appearance of Celestial Pearl Danios

They are colourful fish. The white-spotted bodies combined with the blue base colour. The colour of the fins is deep red or orange. Especially their fins are stand out most. All of the fins have two parallel black lines with bright red or orange colouration depending on the sex.

Size of the Celestial Pearl Danios

They are small fish. They typically are at most 1 inch from head to tail.

Difference between males and females

They have sexual dimorphism, so you will notice different colouration between individuals. Males and females look different. Males are thin and often more vibrant in colour, especially on the tail. The Female’s tail is slightly duller in colour than males. Females are also round in shape.

You should not only keep males in your aquarium. Keep males and females together to keep them healthy.

The Behavior of Celestial Pearl Danios

They are peaceful fish. When you add them new tank they will form a group and explore the tank till they settle in the new tank. I can not say this shoaling fish in the classic sense. You will see males spend their most time courting females and fighting other males.

I would not recommend putting too many males in the same tank. They will fight over females constantly. This may cause serious injury or even death. Keep more females than males to reduce the competition and keep the fighting minimum.

The Tank Requirements of Celestial Pearl Danios

They are found in small, highly vegetated shallow freshwater ponds in South East Asia (Myanmar). They live in slow-moving water. The vegetation provides them hiding places from the wild.

Tank size

They can grow up to 1 inch in length. 10 gallons should be the minimum recommendation for keeping this fish. You can keep 5 or 6 of them in this 10 gallons tank. If you want to keep more of them then a larger tank will be needed. You should aim for 2 gallons per fish.

Water Parameters

The perfect water parameters should be mimicking their natural environment. In the wild, they live in clear shallow ponds with high vegetation.

  • Water Temperature: 73oF-79oF
  • pH levels: 6.5-7.5
  • Water Hardness: 2-10 dKH


Celestial Pearl Danios like live plants. You should plant plenty of plants in your aquarium and also make some hiding space. For hiding space, you can use rock or driftwoods. They will not dig the substrate. So you can use any substrate which is best for the plant you choose.


They can not tolerate pollutants very well, so strong filtration is needed. You can use a standard hang on back or canister filter. They are small fish, so make sure to fill any inlet tubes with sponges.

You don’t need strong pumps or air bladders. Celestial Pearl Danios live a low water flow rate like ponds in the natural environment.

Diet of Celestial Pearl Danios

Celestial Pearl Danios are omnivores, which means they will eat both meat, plant, and vegetables. In the wild, they feed on algae and plants. They also eat small vertebrae and worms.

These fish will eat dry food such as flakes and pellets as long as it is small enough to fit into their mouth. If they are too scared they will not eat. They spend their time in the bottom half of the tank so use sinking pellets.

You also use live or frozen foods. The krill will help with the red colouration of the fins. Daphina, Grindal worms, Monia all make good food for the small fish.

Always cycle the food that they eat. Try not to feed them only one type of food. This will keep them healthy and more vibrant.

When you feed them keep an eye on them to learn their habits. And also this will help you not to overfeed them. Overfeeding can pollute the aquarium and break the water chemistry.

Tankmates for Celestial Pearl Danios

They are peaceful fish. They are great community fish for small non-aggressive fish-like Neon Tetra, Guppies. You can keep them 6-7 fish in the same tank. Try to get more females than males, this will help reduce the competition.

You should not put larger fish with them. Large fish most probably eat the small fish.

Tankmates from another species may need more space than Celestial Pearl Danios. So it is important to know how much space the tank mate will need. Sometimes you will need to increase the size of your tank to make every fish happy.

Here is the list of tankmates that are great for Celestial Pearl Danios:

Hey, I am Shuvradeb Biswas a content writer. Fishkeeping is my hobby. There are many problems I faced during my first fishkeeping. So, I made the KeepingWorld.com blog to help new fishkeepers.

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