Petrocephalus arnegardi is a species of electric fish in the genus Petrocephalus native to the Central Congo River basin. It is found in middle Congo River and in the Likouala River drainage, in the Democratic Republic of the Congo and Republic of the Congo.[1]
It is named after Matthew E. Arnegard (b. 1967)[2], an expert on elephantfishes.
Petrocephalus arnegardi grow to 9cm (04inches) SL. It is a silvery white fish with three distinct bilateral melanin marks: one slightly anterior to the dorsal fin, another one at the base of the pectoral fin, and one centered at the base of the caudal fin. Mouth is small and subterminal.