Petrocephalus boboto and Petrocephalus arnegardi, two new species of weakly electric fish, have been described from the Congo River. Petrocephalus boboto from Yangambi, Congo River, Democratic Republic of Congo. Scale bar – 1 cm. Image credit: Lavoué S, Sullivan JP. Petrocephalus are African weakly fishes of the family Mormyridae that produce pulses of only a few hundred millivolts from an organ made of modified muscle cells in front of their tail. Receptor...
