Celestial Pearl Danio (Danio Margaritatus)

*Note: Images are used as an example only. Due to the nature of live animals, colouration, size and patterns may vary.*

Celestial Pearl Danio
Scientific Name: Danio margaritatus
(Also commonly known as Galaxy Rasbora.)

Overview
The Celestial Pearl Danio is a striking nano fish celebrated for its shimmering pearl-like spots, deep blue body, and vivid orange-red fins. Small, peaceful, and highly decorative, this species is ideal for planted aquariums. Although hardy once settled, it thrives best in stable, mature environments with gentle conditions and a sense of security provided by plants and schooling behaviour.

Key Features

• Distinct pearl-like spotting across a blue body
• Bright orange or red fin highlights
• Small, peaceful, and perfect for nano and planted tanks
• Schooling species that shows best behaviour in groups
• Hardy once established but appreciates a calm, stable environment

Care Level: Easy to Moderate
Celestial Pearl Danios adapt well to home aquariums but do best with stable water parameters, gentle flow, and a planted layout that reduces stress.

Habitat Requirements
Environment Type: Freshwater
Tank Size: Best results in 40+ litres; can be kept in 20 litres with excellent maintenance and a proper group size
Temperature: Ideally 22–26°C; tolerates 20–27°C
Water Parameters: pH 6.6–7.4 preferred; stable 6.5–7.8 acceptable
Water Hardness: Soft to moderately hard water
Water Flow: Gentle to moderate
Aquascape: Planted tanks with dense cover, fine-leaved plants, and open mid-water swimming areas. Shrimp-safe hiding spaces help reduce shyness.

Diet
Primary Diet: High-quality micro pellets or fine flakes suitable for small fish
Variety: Live or frozen foods such as daphnia, baby brine shrimp, cyclops, and micro-worms enhance colour and condition
Flexible Options: They nibble on small natural foods found in mature aquariums
Feeding Frequency: Small meals 1–2 times daily

Compatibility
Tank Mates: Peaceful nano fish, small rasboras, small tetras, Corydoras species, and shrimp
Avoid: Larger or fast, boisterous fish that may outcompete or stress them
Temperament: Peaceful; males can display gentle sparring behaviour, especially when in good condition

Size and Lifespan
Adult Size: 1.5–2.5 cm
Typical Lifespan: 3–5 years with consistent care

Behaviour and Activity
Celestial Pearl Danios are active but gentle shoaling fish. They feel most confident in well-planted aquariums, where their natural colours intensify. Males often display to one another, especially when healthy and well-fed, creating beautiful flashes of red and blue in the aquarium.

Special Requirements or Considerations
A mature tank with stable parameters is strongly recommended. Sudden changes in water quality can cause stress. Keeping them in groups of at least six encourages natural behaviour and reduces shyness. Providing plenty of plant cover brings out their best colours.

Ideal For

• Planted aquariums
• Nano and community setups
• Aquarists who appreciate small, colourful, peaceful fish
• Hobbyists looking for a calm, visually striking species

Additional Notes
Celestial Pearl Danios are most vibrant when kept in a well-planted environment with stable conditions and a varied diet. While they tolerate a reasonable range of setups, optimal care results in rich colouration, confident behaviour, and overall improved health.