he Celestial Pearl Danio is scientifically known as Danio margaritatus.

This tiny freshwater fish looks like it was sprinkled with stardust. Its deep navy-blue body is covered in pearly white spots, resembling a star-filled night sky. The fins are bright orange to red with black striping, especially vivid in males. Adults typically grow to only 1 inch (2.5 cm), making them perfect for nano aquariums.

They were discovered in Myanmar in 2006 and quickly became one of the most sought-after nano fish in the aquarium hobby.

Care Instructions

Tank Size

• Minimum 10 gallons

• Best kept in groups of 6–10 or more

• Larger groups reduce shyness

Water Parameters

• Temperature: 72–78°F (22–26°C)

• pH: 6.5–7.5

• Soft to moderately hard water

• Gentle filtration (low to moderate flow)

They prefer stable water conditions and do best in well-established tanks.

Tank Setup

• Heavily planted aquarium recommended

• Floating plants help them feel secure

• Dark substrate enhances their colors

• Provide hiding spots (rocks, moss, driftwood)

They can be shy at first but become bold in comfortable environments.

What Do Celestial Pearl Danios Eat?

They are micro-predators in the wild.

Staple Diet

• High-quality micro pellets

• Crushed flakes

Live/Frozen Foods (highly recommended)

• Baby brine shrimp

• Daphnia

• Microworms

• Grindal worms

Small foods are important because of their tiny mouths. Feed 1–2 small meals daily.

Fun Facts

• Their pattern resembles a galaxy, which is why they’re nicknamed “Galaxy Rasboras.”

• Males display brighter red fins and compete gently for females.

• Their colors intensify in darker tanks with good diet.

• Despite their small size, they have big personalities and fascinating courtship dances.