Brilliant Rasbora

Rasbora sp.

Brilliant Rasbora (Rasbora sp.) — Easy care, Peaceful, under Rasbora. Minimum tank in the app: 19.8 US gal min; aim for 72–82°F and pH 5.5–7.5. The Brilliant Rasbora is ideal for aquarists seeking a lively, peaceful shoaling fish that thrives in groups.

Brilliant Rasbora (Rasbora sp.) in a planted freshwater aquarium
Care levelEasy
TemperamentPeaceful
Min tank size19.8 US gal min
pH range5.5–7.5
Temperature72–82°F
Max size3.5 in (9.0 cm)
Captive lifespan5–10 years
SchoolingYes · 6+ recommended

Captive lifespan reflects typical experience in a home aquarium, not maximum recorded age; genetics, sourcing, and care vary.

Natural distribution

Southeast Asia

  • East & Southeast Asia

Regional colours match the stocking calculator’s origin map.

Brilliant Rasbora Tank Setup

Create a spacious environment with plenty of mid-level swimming space, complemented by well-placed plants and driftwood to provide refuge without crowding. A gentle water flow and a soft substrate enhance comfort, while moderate lighting can highlight their colors without inducing stress. Aim for a layout that encourages movement and exploration, facilitating natural behavior.

What Do Brilliant Rasboras Eat?

These omnivores eagerly accept a variety of micro foods, but they can exhibit competitive feeding behavior if not adequately supplied. Ensuring a steady food supply is crucial to preventing health issues and enhancing coloration, as their vibrancy can diminish in times of stress from inadequate nutrition.

Brilliant Rasbora Tank Mates

Brilliant Rasboras pair well with similarly sized and temperament-friendly species, such as small tetras and peaceful barbs. Caution is advised with fin-nippers or overly aggressive tank mates, as their calm demeanor may leave them vulnerable. Intraspecies, they thrive in groups of at least six, with larger groups enhancing their confidence and reducing stress.

Are Brilliant Rasboras Good for Beginners?

In App-aquatic we file this under easy care. That still means a cycled tank, realistic stocking, and parameters that do not swing every weekend. Aquarists often underestimate the social needs of Brilliant Rasboras, leading to poor group dynamics and stress. neglecting water quality parameters, especially pH and temperature, can result in health issues.

Building a community? Run the full list through the stocking calculator before you add anything else.

Log tests and reminders in App-aquatic—free, same data you see here.