Pearl danio Care Guide: Diet, Tank Mates, Diseases, Breeding & More

Updated: November 14, 2022

The pearl danio is a beautiful freshwater fish that is perfect for beginner aquarium hobbyists. They are easy to care for and have a very peaceful temperament, making them a great addition to any community tank.

Despite their small size, pearl Danios are very active fish that love to swim. They are also very social creatures and do best when kept in groups of 6 or more.

In this guide, we will go over everything you need to know about pearl danio care. From diet and tank mates, to breeding and lifespan, we’ve got you covered!

Species overview

Pearl Danios (Danio albolineatus) are found in a few different river basins in Myanmar, Thailand, and India. They prefer areas with little to no current and a good amount of plant life that they can use for hiding and grazing.

In the wild, these fish are known to eat a variety of small invertebrates as well as plants. They are peaceful by nature and can get along with most other tank mates, making them a good choice for community tanks.

The Pearl Danio is a very popular fish in the aquarium trade due to its bright coloration and small size. They are a hardy species that is relatively easy to care for, which makes them a good choice for beginner aquarists.


Pearl danio

The Pearl Danio is a very popular freshwater fish due to its bright coloration and patterning. The body of this fish is a translucent white with black spots that cover the entire fish. These spots are slightly larger on the dorsal half of the fish and get smaller as they approach the ventral side.

The fins on the Pearl Danio are also white with black spots. The dorsal fin is taller than the ventral fins and both of them start about two-thirds of the way back on the body.

The caudal fin is forked and slightly taller than the dorsal fin. The anal fin is the same height as the dorsal fin.

The Pearl Danio is a very active fish that loves to swim and play. They’re known for being quite playful and can often be seen chasing each other around the tank.


The pearl danio has a lifespan of up to five years, although the average is closer to three years. These fish are relatively hardy and can withstand a wide range of conditions, but their lifespan will be impacted by the quality of their environment.

Things like water quality, diet, and tank mates can all play a role in how long your pearl danio lives.


The Pearl Danio is a small freshwater fish that only grows to be about 2 inches in length.


Tank Size

The minimum tank size for a school of pearl danios is 10 gallons.

As with most fish, we recommend going slightly larger if you can. A 20 gallon tank will give you a lot more room to work with and allow you to keep more fish or add other tank mates.

Water Parameters

The Pearl Danio is a tropical freshwater fish that prefers warm water with a neutral to slightly alkaline pH. They are not overly fussy when it comes to water hardness, but prefer slightly softer water.

The Pearl Danio is a very active fish that needs plenty of space to swim. They do best in a well-planted aquarium with plenty of hiding places. They are peaceful fish that can be kept with a wide variety of other tropical fish.

  • Water Temperature: 72-78 degrees Fahrenheit
  • pH Levels: 6.8-7.5
  • Water Hardness: 5-15 dGH
  • Alkalinity Levels: 2-12 dKH

What To Put In Their Tank

When it comes to setting up an aquarium for Pearl Danios the sky is the limit. These fish are not picky when it comes to their habitat and will do well in a wide variety of setups.

One of the most important things to consider is the size of your tank. Pearl Danios are small fish, which means they don’t need a lot of space. A 10-gallon tank is more than enough for a small school of these fish.

In terms of decorations, you can go with anything that you think looks nice. Plants, driftwood, rocks, and caves are all suitable options. Just make sure that whatever you choose can’t easily be knocked over (these fish like to swim around a lot).

As for the substrate, Pearl Danios don’t have any specific requirements. Gravel is always a good choice, but sand or even bare bottom tanks are fine too.

Common Diseases

As with most freshwater fish, the pearl danio is susceptible to a variety of diseases and illnesses. The most common of these is ich, which is a parasitic infection that manifests as white spots on the body of the fish.

Other common infections include bacterial and fungal infections, both of which can be treated with medication.

One disease that is particularly dangerous to pearl Danios is columnaris, which is a bacterial infection that attacks the skin and fins of the fish. If left untreated, this disease can be fatal.

The best way to prevent your pearl Danios from getting sick is to maintain clean and stable water conditions in their tank. A well-maintained tank will go a long way in keeping your fish healthy and happy.

Behavior & Temperament

The pearl danio is a schooling fish, which means it’s happier when it’s around others of its kind. In the wild, these fish live in groups of at least 10. So, if you’re keeping pearl Danios, we recommend stocking your tank with at least six of them.

These fish are very active, so they need a lot of space to swim. A 20-gallon tank is the minimum size we recommend. Otherwise, they may start to feel cramped, which will lead to stress.

When it comes to temperament, pearl Danios are peaceful fish. They’re not aggressive and usually get along well with other tank mates. The only exception is if you put them in a tank with fish that are much larger than them. In that case, the pearl Danios may become lunch!

Overall, these are great fish for beginner aquarists. They’re easy to care for and are a lot of fun to watch.

Tank Mates

The pearl danio is a schooling fish, so it’s important to keep them in groups of at least six. This will help reduce stress levels and make them feel more comfortable in their environment.

When it comes to finding tank mates for pearl Danios, the options are endless. These fish are peaceful and get along with just about everyone.

Because they’re so small, you can even keep them with larger fish species. As long as the fish you choose aren’t aggressive or territorial, they should do just fine.

Here are a few compatible tank mates to get you started:

  • Guppies
  • Mollies
  • Platies
  • Swordtails
  • Neon Tetras
  • Ember Tetras
  • Harlequin Rasboras
  • White Cloud Mountain Minnows


The pearl danio is another species of freshwater fish that is easy to breed in captivity. These fish are known to be prolific breeders, so you shouldn’t have any trouble getting them to produce young.

The first step is to set up a breeding tank. It should be at least 10 gallons in size. Then, fill it with water that’s around 72 degrees Fahrenheit. You can use a sponge filter to keep the water clean.

Next, add plenty of live plants to the tank. Pearl danios love to hide in the plants, so this will make them feel more comfortable. Add a layer of fine gravel to the bottom of the tank.

When everything is set up, it’s time to add the fish. You should add two females for every male. Pearl danios are known to be aggressive when it comes to spawning, so it’s best to err on the side of caution.

Once the fish are in the tank, they should start breeding fairly quickly. The female will lay her eggs on the plants, and the male will fertilize them.

After the eggs have been laid, remove the adults from the tank. The fry will hatch in about three days. They will be very small, so you’ll need to feed them baby brine shrimp or other small live foods.


All in all, we think the Pearl Danio is a great fish for anyone looking for a low-maintenance pet. They’re easy to care for, don’t require a lot of space, and are very peaceful.

We do recommend that you keep them with other fish, as they can be a little shy on their own. But other than that, we think they make a great addition to any home aquarium!