Cardinal Tetra

A vivid red-and-blue schooling tetra whose red stripe extends along most of the lower body. Adults stay small, generally about 4–5 cm including the tail.

Aquarium and care

Keep at least eight to ten in a mature planted aquarium. Warm water around 24–28°C, soft to moderately soft water, subdued areas, and clean stable conditions suit this species. Provide both swimming room and shaded refuge; avoid abrupt temperature or chemistry changes.

Feeding

Feed fine flakes, micro pellets, and small frozen or live foods. Their small mouths need appropriately sized food rather than large community pellets.

Temperament and tank mates

Ideal with peaceful small tropical fish. Larger fish may see them as food, and very hard-water communities are a poor long-term match.

Buying information

Choose from the current size and purchase options shown on this page. Listed sale sizes describe the fish or livestock supplied, not its adult size. Photographs show representative appearance; individual color, markings, and development can vary.