These diminutive shoaling fish form large aggregations, and are often joined by the very similar-looking Corydoras hastatus (which unusually for a Corydoras species, swims in midwater). This mimetic relationship is thought to afford the Corydoras improved foraging opportunities and better protection from predators.

Reed Tetras are a peaceful species, ideal for mature softwater aquaria. The tank should be furnished with plenty of driftwood to create lots of shady areas, and the tannins that are gradually released from the wood should help to acidify the water whilst giving it a natural, clear tea-colour (and the fish often show enhanced colours under such conditions). Peat filtration can also help in this respect. Dense planting, both rooted and floating, will help to make the fish feel secure.

Max size: around 2.5cm (1″)