Rosy Barb (Pethia conchonius) 3–5cm
Rosy Barb (Pethia conchonius) brings active schooling behaviour and a clearly named colour or fin form to a suitably prepared aquarium. Plan its home around adult space, water, diet and social needs rather than the current sale size.
Quick Facts
- Scientific name: Pethia conchonius
- Product type: freshwater barb
- Sale size: Approximately 3–5cm as listed
- Sale unit: One individual per quantity ordered unless the listing states otherwise
- Social needs: Best planned around the species’ adult size and social behaviour; many barbs benefit from a suitable group
| Size | 3–5cm |
|---|---|
| Species | Pethia conchonius |
| Environment | Freshwater aquarium |
FAQ
What is the typical adult size of Rosy Barb?
Rosy Barb typically grow to around 5cm in adult size, though they are often sold at 3–5cm when first introduced.
Do Rosy Barbs need to be kept in groups?
Yes, Rosy Barbs are social fish and perform best in groups. A school of at least 6 individuals is recommended for natural behaviour and reduced stress.
What kind of water conditions do Rosy Barbs prefer?
Rosy Barbs prefer warm, well-oxygenated water with a stable temperature between 22–26°C and a neutral to slightly acidic pH.

Lily Newman –
The Rosy Barbs are lively and active, forming a nice school in the tank. They adapt well to my 60-liter aquarium with proper water parameters. Easy to care for and add a lot of visual appeal.
Claire Metcalfe –
I bought a small group and they’ve been peaceful and active. They seem to thrive in a well-maintained tank with regular water changes and a balanced diet.
Blake Newman –
The fish are colorful and active, especially when the tank has plants and some hiding spots. I’ve kept them for three months and they’re still healthy and showing good schooling behaviour.