gymnarchus niloticus

One of the more unique species of knifefish, the Aba Aba is found throughout much of Africa, where it inhabits shallow, slow moving bodies of water. While juvenile fish are often found in small groups, adults become solitary large predators which like most knifefish use a specialized organ to detect the weak electrical currents generated by other fish. In the aquarium, they tend to be extremely aggressive, often attacking tankmates at night. This combined with their huge adult size makes them best suited for a species tank.