This active species has been known in the hobby since 1922. It is often recommended as an ideal community fish, although its behavior does not always justify this. Specimens in peak condition exhibit very attractive red coloration in the fins, except the pectoral fins. A variant, in which the caudal fin is predominantly yellow, is occasionally available.
- Argentina (mainly around Rio de la Plata), southeastern Brazil, and Paraguay.
- Up to 4 3/4in (12cm) reported, but usually around 2 3/4-3in (7-8cm).
- Generally a peaceful shoaler, but larger specimens can become progressively more aggressive with age. Has a distinct appetite for succulent plants.
- Wide variety of foods accepted.
- Plant thickets (not delicate succulent types) and open swimming spaces required. Water chemistry not critical, but quality must be good and oxygenation level high. Temperature range: 64-82°F (18-28°C).
- Eggs are scattered among vegetation and may be eaten by the parents. Hatching takes about 1 da