Nannothrissa is a genus of very small fish in the herring family, Clupeidae, endemic to the Congo River system in Africa. There are currently only two recognized species Species Nannothrissa parva (Regan, 1917) (Lake Tumba dwarf sprat) Nannothrissa stewarti Poll & T. R. Roberts, 1976 (Mai-ndombe dwarf sprat) References Clupeidae Fish of Africa Freshwater fish genera Taxa named by Max Poll