 Southern Bluefin Tuna are targeted by fishing fleets from a number of nations.This occurs on the high seas and within the Exclusive Economic Zones of Australia, New Zealand, Indonesia and South Africa.The onset of industrial fishing in the 1950s, in conjunction with ever-improving technologies such as GPS, fishfinders, satellite imagery, etc., and the knowledge of migration routes, has led to the exploitation of southern bluefin tuna across its entire range.