Biology Of Tuna, Tuna Fisheries
Tuna are large, fast-swimming bony fish (teleosts of the family Scombridae) found in waters of the world's oceans. All species of tuna are economically important, usually supporting a large commercial fishery, and sometimes a local sport fishery. The largest species is the bluefin tuna (Thunnus thynnus), which can achieve a length of 13 ft (4 m) and weigh up to 1,760 lb (800 kg). Populations of bluefin tuna occur in temperate and warm waters throughout the world. Smaller species of tunas include the albacore tuna (T. alalunga), yellowfin tuna (T. albacares), skipjack tuna (Euthynnus pelamis), bonitos (Sarda spp.), frigate mackerels (Auxis spp.), Spanish mackerels (Scomberomorus spp.), and the wahoo (Acanthocybium spp.).