Red-tailed Rasbora
Rasbora sp.
Red-tailed Rasbora (Rasbora sp.) — Easy care, Peaceful, under Rasbora. Minimum tank in the app: 18.5 US gal min; aim for 72–79°F and pH 5.5–7.5. The Red-tailed Rasbora is an engaging choice for aquarists seeking lively shoaling behavior within a tranquil community setup.

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.
Red-tailed Rasbora Tank Setup
Aim for a spacious layout that allows free swimming in the mid and upper layers, complemented by some plants or driftwood to provide shelter without obstructing movement. Soft, sandy substrate can help mimic their natural habitat, while moderate lighting can enhance their colors without causing undue stress. Ensure good water flow to stimulate their activity levels.
What Do Red-tailed Rasboras Eat?
Red-tailed Rasboras benefit from a diverse diet of micro foods, which can enhance their coloration and overall health. While they are not aggressive feeders, ensure enough food distribution to reduce competition and stress during meal times, as any perceived scarcity can lead to unease among the group.
Red-tailed Rasbora Tank Mates
These rasboras harmonize well with similarly sized peaceful species, such as small tetras or gentle barbs, where their non-aggressive nature thrives. Avoid larger, more boisterous tankmates that could intimidate them. Within their own species, maintaining a minimum group size of six fosters stability, as they are social fish that rely on numbers for comfort.
Are Red-tailed 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 importance of group dynamics, leading to solitary or small groups that result in stressed individuals. neglecting water parameters can disrupt their well-being, as they thrive in slightly acidic to neutral pH levels.
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.




