Barbus is the type genus of the barb group within the carp family, and in its modern, narrowed sense it holds the true barbels of Europe, the Balkans, the Caucasus, and parts of the Middle East and North Africa. The atlas covers 35 species ranging from about 3 in up to 47 in, with country records concentrated in Greece, Turkey, Italy, Bulgaria, North Macedonia, Romania, Croatia, and Iran — a pattern that traces the rivers draining into the Mediterranean, Adriatic, Black Sea, and Caspian basins. Species in the genus share an elongated, cylindrical body, a subterminal, downturned mouth flanked by barbels used to locate food on the riverbed, and a strong preference for flowing, well-oxygenated water over gravel or rocky substrate — Barbus barbus, the common barbel that gives the genus its name, is the archetype of this body plan.
Because many Barbus species reach a substantial adult size, the genus is better known to European river anglers than to home aquarists, though smaller species occasionally turn up in specialist coldwater or river-biotope setups. The genus also has taxonomic history worth noting: many species long lumped into a much broader, worldwide 'Barbus' have since been moved into separate genera such as Luciobarbus and various African and Asian barb genera, leaving the modern Barbus concept centered on the Western Palearctic. Conservation status varies by drainage: the atlas records a majority of Least Concern species alongside a meaningful share of Near Threatened, Vulnerable, and Endangered species, consistent with how many of these barbels are restricted to single river systems vulnerable to damming, pollution, and abstraction.