Petrocephalus balayiPetrocephalus balayi is a species of electric fish in the family Mormyridae, found only in the Ogowe River in Gabon and the Congo River basin in Cameroon, Republic of the Congo and the Democratic Republic of the Congo.SizeThis species reaches a length of.EtymologyThe fish is named in honor of French explorer and colonial administrator Noel Eugene Balay, who collected the holotype specimen.