Petrocephalus simus is a species of electric fish in the family Mormyridae, found in Guinea Bissau to Angola. It is also widely distributed in the Congo River basin, in the Central African Republic, Cameroon, the Democratic Republic of the Congo, Angola and Zambia.Gosse, J.-P. (1984). Mormyridae. p. 63–122. En J. Daget, J.-P. Gosse y D.F.E. Thys van den Audenaerde (eds.) Check-list of the freshwater fishes of Africa (CLOFFA). ORSTOM, París y MRAC, Tervuren. Vol. 1.
Size This species reaches a length of .
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