Mamba Mutu is a merbeing, reported from Lake Tanganyika and Lukuga River, Democratic Republic of the Congo. Half human, half fish. Sucks human blood and eats brains.
- Isolated population of the West African manatee (Trichechus senegalensis), though these animals are herbivorous.
- An unknown species of giant otter with a flat skull, suggested by zoologist Carlos Bonet.