Rummy-Nose Tetra

The Rummy-Nose Tetra (Hemigrammus bleheri) is one of the most striking and recognizable freshwater aquarium fish in the hobby. Known for its vibrant red face, shimmering silver body, and bold black-and-white striped tail, this South American species brings movement, contrast, and elegance to any aquascape. Native to the Rio Negro and other tributaries of the Amazon Basin, the Rummy-Nose Tetra thrives in soft, slightly acidic waters with dense aquatic vegetation and subdued lighting.

Growing to around 4–5 cm (1.5–2 inches) in length, Rummy-Nose Tetras are peaceful schooling fish that should always be kept in groups of at least six, though larger schools of 10 or more create a far more impressive and natural display. When kept in proper numbers, they exhibit tight schooling behavior, moving in near-perfect synchrony across the aquarium. This coordinated swimming makes them especially popular in nature-style aquascapes and Iwagumi layouts, where their red heads create a dramatic visual contrast against lush green plants.

Water quality is extremely important for this species. Rummy-Nose Tetras are sensitive to poor conditions, making them excellent indicators of tank health. Their bright red coloration will fade if they are stressed or if water parameters fluctuate. Ideal conditions include temperatures between 24–28°C (75–82°F), pH levels between 5.5 and 7.0, and soft to moderately soft water. Stable, well-maintained aquariums with gentle flow and high oxygen levels will help them thrive.

In aquascaping setups, Rummy-Nose Tetras pair beautifully with fine-leaved plants such as Rotala, Myriophyllum, Cabomba, and background stems, as well as moss-covered driftwood and natural hardscape elements. A slightly darker substrate enhances their coloration, while layered plant backgrounds create depth and scale, ensuring the fish appears naturally integrated into the environment rather than oversized. Soft, diffused lighting highlights the metallic sheen of their scales and adds dimension to their translucent fins.

Diet-wise, they are omnivorous and accept high-quality flakes, micro pellets, frozen foods, and live foods such as daphnia and brine shrimp. A varied diet intensifies their red head coloration and supports overall health.

Because of their peaceful temperament, Rummy-Nose Tetras make excellent tank mates for other calm community fish such as Cardinal Tetras, Corydoras, small Rasboras, and Apistogramma species. Avoid housing them with aggressive or significantly larger fish.

With proper care, stable water parameters, and a well-designed aquascape, the Rummy-Nose Tetra becomes a dynamic centerpiece in planted aquariums. Their synchronized schooling, vibrant coloration, and sensitivity to water quality make them both visually captivating and rewarding to keep.