The Black Emperor Tetra (Nematobrycon palmeri, black morph) is a peaceful and striking freshwater fish that thrives in a well-planted community aquarium. They prefer soft, slightly acidic to neutral water and do best in groups of at least six to reduce stress and encourage natural shoaling behavior. These tetras grow to about 2 inches and require a minimum 20-gallon tank with plenty of swimming space, subdued lighting, and hiding spots among driftwood or plants. Their diet should be varied with high-quality flakes, micro-pellets, frozen, and live foods like brine shrimp or daphnia to enhance their coloration. They are generally hardy but need stable water parameters to stay healthy, making them suitable for both beginner and intermediate aquarists.
| Aspect | Care Requirements |
|---|---|
| Scientific Name | Nematobrycon palmeri (Black Morph) |
| Common Name | Black Emperor Tetra |
| Size | Up to 2 inches (5 cm) |
| Tank Size | Minimum 20 gallons |
| Temperament | Peaceful, best kept in groups of 6+ |
| Water Temperature | 72–80°F (22–27°C) |
| pH Range | 6.0–7.5 |
| Water Hardness | 3–12 dGH |
| Tank Setup | Planted tank with driftwood, subdued lighting, open swimming areas |
| Diet | Omnivore – flakes, micro-pellets, live and frozen foods |
| Lifespan | 5–6 years |
| Compatibility | Peaceful community fish; avoid aggressive or fin-nipping species |
