Common name: Black Line Tail Tetra.
Species: Moenkhausia costae.
Habitat: South America: Sao Francisco and Itapicuru rivers.
Potential size: 6cm.
Social behaviour: Boisterous and lively but generally peaceful. Best kept in a spacious aquarium in groups of 5 or 6+ with other species of a similar size and nature.
Food: Flake, granules, frozen food, live food etc.