Inland Silverside in the Anacostia watershed, Washington DC. Menidia berylina
The Neotropical silversides are a family, Atherinopsidae, of fishes in the order Atheriniformes. About 104 species in 13 genera are distributed throughout the tropical and temperate waters of the New World, including both marine and freshwater habitats. The familiar grunions and Atlantic silverside belong to this family.