Nannothrissa parva (通巴湖細棱鯡) is a species of ray-finned fishes in the family herrings. They are associated with freshwater habitat. Individuals can grow to 4.2 cm.
Africa: middle Congo River (Ref. 94751), Lake Tumba area (Ref. 93833, 94751), Ruki River (Ref. 41580, 93833) and Ubanghi River (Ref. 4910) in Democratic Republic of the Congo
Definition: A habitat that is in or on a body of water containing low concentrations of dissolved salts and other total dissolved solids (<0.5 grams dissolved salts per litre).
Comment: "Small" is ambiguous. For details on "Small rivers" (e.g. the Salween river) see http://worldwildlife.org/biomes/small-river-ecosystems. This class will be replaced with a less ambiguous class.
Definition: length of a fish measured from the tip of the snout to the posterior end of the last vertebra or to the posterior end of the midlateral portion of the hypural plate. Simply put, this measurement excludes the length of the caudal fin
