Alosa caspia
Alosa caspia is a species of clupeid fish, one of the species of shad (genus "Alosa") endemic to the Caspian Sea basin. FishBase treats separately three subspecies from the Caspian: Previously the taxonomic circumscription and geographic range of "A. caspia" have been broader, encompassing also the Sea of Azov and Black Sea basins. Up to ten subspecies were recognised; these included forms now classified as "Alosa tanaica" (and its synonyms) and even the Balkan freshwater endemics "Alosa macedonica" and "Alosa vistonica".