Name: Green Knifefish (Eigenmannia virescens) Max Size: Up to 12 inches Water Parameters: pH 6.0-7.5, temperature 75-82°F, hardness 3-12 dGH Diet: Carnivorous – primarily feeds on live or frozen foods such as bloodworms, brine shrimp, small fish, and insect larvae. Can sometimes be trained to accept high-quality sinking pellets. Temperament: Generally peaceful but can be territorial with other knifefish. Best kept in a species-only tank or with other non-aggressive, similarly sized fish. Tank Setup: Requires a spacious aquarium with plenty of hiding spots, such as caves, driftwood, and dense plants. A soft sandy substrate is recommended, along with subdued lighting to mimic their natural nocturnal environment. Compatibility: Can coexist with peaceful, mid-to-top dwelling fish like larger tetras, peaceful cichlids, and gouramis. Avoid aggressive or overly active species that may outcompete them for food. Behavior: Nocturnal and shy, often hiding during the day and becoming more active at night. Uses weak electric fields to navigate and detect prey in low-light conditions. Fun Fact: Green Knifefish are one of the few freshwater fish that use electrical signals to communicate and sense their surroundings, making them a fascinating addition to an aquarium.
