Mahseers are large-scaled carp of the family Cyprinidae, prized game fish generally found in India and southern Asia.

They were originally described by Francis Buchanan-Hamilton in 1822, and first mentioned as an angling challenge by the Oriental Sporting Magazine in 1833, soon becoming a favorite quarry of British anglers living in India. The Golden Mahseer has been known to reach 9 ft in length and 118 lb in weight, although specimens of this size are rarely seen nowadays.

Mahseers inhabit both rivers and lakes, ascending to rapid streams with rocky bottoms for breeding. Like other types of carp, they are omnivorous, eating not only algae, crustaceans, insects, frogs, and other fish, but also fruit that falls from trees overhead.

In addition to being caught for sport, Mahseer are also part of commercial fishing.