Bass ( //) is a name shared by many species of fish. The term encompasses both freshwater and marine species, all belonging to the large order Perciformes, or perch-like fishes. The word bass comes from Middle English bars, meaning "perch". 
- The black basses, such as the Choctaw bass (Micropterus haiaka), Guadalupe bass (M. treculii), largemouth bass (M. salmoides), smallmouth bass (M. dolomieu), and spotted bass (M. punctulatus) belong to the sunfish family, Centrarchidae.
- The temperate basses, such as the European seabass (Dicentrarchus labrax), striped bass (Morone saxatilis) and white bass (M. chrysops), belong to the family Moronidae.
- The Asian seabasses, such as the Japanese seabass (Lateolabrax japonicus) and Blackfin seabass (L. latus), belong to the family Lateolabracidae.
Many species are also known as basses,  including:
- The Australian bass, Macquaria novemaculeata, is a member of the temperate perch family, Percichthyidae.
- The black sea bass, Centropristis striata, is a member of the sea bass and sea grouper family, Serranidae.
- The Chilean sea bass, Dissostichus eleginoides, also known as the Patagonian toothfish, is a member of the cod icefish family, Nototheniidae.
- The giant sea bass Stereolepis gigas, also known as the black sea bass, is a member of the wreckfish family, Polyprionidae.
- The "lanternbellies" or "temperate ocean-basses", Acropomatidae.
- The " butterfly peacock bass", Cichla ocellaris, is a member of the cichlid family, Cichlidae and a prized game fish along with its relatives in the genus Cichla.
Largemouth, smallmouth, and spotted bass are the most popular game fish in North America.
It is also very popular in South Africa where the largemouth bass is often found in lakes, rivers, creeks, and dams.
When fishing, lures ( Bass worms) or live bait will work. Lures that mimic baitfish, worms, crayfish, frogs, and mice are all effective.
- " Bass, the name of various trimly shaped, active, gamy fishes of both fresh and salt water". Encyclopedia Americana. 1920.