The Emperor Tetra (Nematobrycon palmeri) is a graceful and colorful freshwater fish prized for its shimmering purple-blue body, long flowing fins, and distinctive black horizontal stripe. Native to Colombia’s slow-moving rivers, these peaceful tetras thrive in groups of six or more within a well-planted aquarium that provides shaded areas and gentle filtration. They prefer clean, slightly acidic to neutral water and subdued lighting, which enhances their rich coloration. Emperor Tetras are omnivores and enjoy a balanced diet of high-quality flakes or pellets, supplemented with live or frozen foods such as brine shrimp, daphnia, and bloodworms. Hardy and adaptable, they make excellent additions to community tanks with other calm, similarly sized fish.
| Aspect | Details |
|---|---|
| Scientific Name | Nematobrycon palmeri |
| Common Name | Emperor Tetra |
| Origin | Colombia (San Juan and Atrato River basins) |
| Size | Up to 2 inches (5 cm) |
| Lifespan | 5–6 years |
| Temperament | Peaceful, semi-schooling |
| Tank Size | Minimum 20 gallons |
| Water Temperature | 73–81°F (23–27°C) |
| pH Range | 5.0–7.5 |
| Water Hardness | 3–12 dGH |
| Substrate | Dark sand or fine gravel |
| Diet | Omnivore – flakes, micro pellets, live/frozen foods |
| Tankmates | Peaceful species (tetras, rasboras, corydoras, dwarf gouramis) |
| Breeding | Egg scatterer; dim lighting and soft water recommended |
| Care Level | Easy |
| Special Notes | Males are more colorful with longer fins; thrive in groups of 6+ |
