Nannopetersius lambertiNannopetersius lamberti is a species of freshwater ray-finned fish belonging to the family Alestidae, the African tetras. It is found in the African river basins of the Ntem, the Ogooué, the Nyanga and the Kouilou Rivers.DescriptionNannopetersius lamberti reaches a standard length of.EtymologyThe species epithet is named in honor of Belgian ichthyologist Jacques G. Lambert, who collected the type specimen.