Common name: Purple Pencilfish.

Species: Nannostomus rubrocaudatus.

Habitat: Western Peru, near the foothills of the Andes mountains.

Potential size: 3cm.

Social behaviour: Generally a peaceful community fish. Rival males are territorial with one another but in a heavily planted aquarium any issues can usually be avoided.

Food: Flake, granules, frozen food, live food etc.