Xenomystus Nigri

Xenomystus nigri, the African Brown Knife Fish or African Knife Fish, is the only species in the genus Xenomystus of the family Notopteridae. This fish inhabits coastal river basins in Sierra Leone, Liberia, Togo, Benin and Cameroon. It also in Chad, the Nile, the Congo, and the Niger basins.

Read more about Xenomystus Nigri:  Anatomy and Appearance, Ecology, In The Aquarium, Social Behavior