Blue Badis

Blue Badis (Badis badis) is a striking and characterful nano fish prized for its electric blue to steel-grey colouration, compact size, and fascinating behaviour. Native to South Asia, this small perch-like species is perfect for planted aquariums where its colours intensify and its natural personality shines. Ideal for experienced aquarists who enjoy observing unique behaviours, the Blue Badis makes an exceptional feature fish in smaller community or species tanks.

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Features of Blue Badis

• Native habitat: slow-moving streams, ponds, and rice paddies of India, Nepal, and Bangladesh
• Maximum size: approximately 6–8 cm in length
• Lifespan: 4–6 years with proper aquarium care
• Temperament: semi-aggressive; best kept singly or as a male with multiple females
• Colouration: iridescent blue, grey, and black patterning; males show stronger colours
• Behaviour: bottom- to mid-level dweller; territorial but highly engaging and curious

The Best Aquarium Size for Blue Badis

A minimum aquarium size of 40 litres is recommended, with larger tanks preferred for groups or mixed communities. Heavily planted aquariums with visual barriers help reduce territorial behaviour and encourage natural activity. Gentle water flow best mimics their natural environment.

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Tank Mate Compatibility for Blue Badis

Blue Badis can be territorial, especially males, but do well with calm, similarly sized tank mates. Suitable companions include:
• Small rasboras
• Ember tetras
• Peaceful gouramis
• Corydoras catfish
• Amano or larger shrimp (small shrimp may be eaten)

Avoid fin-nippers, aggressive fish, or very small species that may be preyed upon.

Diet for Blue Badis

Blue Badis are carnivorous micro-predators and can be fussy eaters. They thrive on a diet of frozen and live foods such as bloodworms, brine shrimp, daphnia, and blackworms. Some individuals may accept high-quality micro pellets once established. Feed small portions once or twice daily.

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Aquarium Setup for Blue Badis

Aquarium Filtration

Low to moderate filtration is recommended. Sponge filters or gentle canister filters are ideal, as strong currents can stress this species.

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Aquarium Plants

Live plants are highly recommended. Dense planting with species such as Java fern, Anubias, Cryptocoryne, and floating plants provides shelter and enhances colouration.

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Aquarium Lighting

Low to moderate lighting is ideal. Softer lighting conditions help Blue Badis feel secure and display richer colours. Adjustable LED lighting works well. We recommend Zetlight LED aquarium lighting that allows for easy adjustability in a full range of spectrums.  

Aquarium Heating

Maintain stable temperatures between 22–26°C using a reliable aquarium heater and thermometer.

Aquarium Substrate

Fine sand or smooth gravel is best, allowing natural foraging behaviour and complementing planted layouts.

A variety of Substrates are available at Coburg Aquarium.

Aquarium Decorations

Use driftwood, rocks, caves, and dense plant clusters to create territories and hiding spots. A structured layout reduces aggression and supports natural behaviour while keeping the tank visually stunning.