Black Ruby Barb

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The Black Ruby Barb is a striking, peaceful schooling fish known for its deep ruby-red and black colouration. Males develop especially vibrant colours when mature and when displaying to females, making a group of these barbs a spectacular addition to a planted freshwater aquarium.

Native to Sri Lanka, Black Ruby Barbs are active but generally peaceful and are best kept in groups where they can display natural schooling and social behaviour. Their compact size makes them well suited to community aquariums with plenty of plants, wood and open swimming space.

Quick Care Guide

• Scientific Name: Pethia nigrofasciata
• Adult Size: Around 5–6 cm
• Temperament: Peaceful
• Water Type: Freshwater
• Temperature: 22–27°C
• pH: 6.0–7.5
• Difficulty: Easy–Moderate
• Diet: Omnivore
• Minimum Group: 6+
• Aquarium: Planted community aquarium

FAQ

Are Black Ruby Barbs aggressive?

No. They are generally peaceful, although males may occasionally display and chase one another. Keeping them in a suitable-sized group helps spread this behaviour naturally.

How many Black Ruby Barbs should I keep?

A group of 6 or more is recommended. Larger groups will generally display more natural behaviour and provide better visual impact.

What do Black Ruby Barbs eat?

They readily accept quality flakes and micro pellets. Supplementing their diet with frozen or live foods such as brine shrimp and daphnia can help enhance colour and condition.

Can Black Ruby Barbs live with other fish?

Yes. They make excellent community fish when housed with other peaceful species of a similar size.

Common Mistakes

Keeping them in pairs or singles

Black Ruby Barbs are schooling fish and should be kept in a proper group.

Overlooking water quality

They benefit from clean, stable water and regular maintenance.

Using overly aggressive tank mates

Large or aggressive fish can stress these relatively peaceful barbs and may outcompete them for food.