''Genyomyrus donnyi'' is a

species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s ...

of elephantfish in the family Mormyridae being the only member of its genus. It occurs only in the

Congo River The Congo River ( kg, Nzâdi Kôngo, french: Fleuve Congo, pt, Rio Congo), formerly also known as the Zaire River, is the second longest river in Africa, shorter only than the Nile, as well as the second largest river in the world by discharge ...

basin in Middle Africa. It reaches a length of about .

References

Weakly electric fish Mormyridae Fish of Africa Monotypic ray-finned fish genera Fish described in 1898 {{Osteoglossiformes-stub