fishing has conventions, rules, licensing restrictions and laws that limit how fish may be caught; typically, these prohibit the use of nets and the catching of fish with hooks not in the mouth. The most common form of recreational fishing is done with a rod, reel, line, hooks and any one of a wide range of baits or lures such as artificial flies. The practice of catching or attempting to catch fish with a hook is generally known as angling. In angling, it is sometimes expected or required that fish be returned to the water (catch and release). Recreational or sport fishermen may log their catches or participate in fishing competitions. The estimated global number of recreational fishers varies from 220 million to a maximum number of 700 million fishers globally, which is thought to be double the number of individuals working as commercial fishers. In the United States alone it was estimated that 50.1 million people engaged in fishing activities in both saltwater and freshwater environments. Big-game fishing is fishing from boats to catch large open-water species such as tuna, sharks, and marlin. Sportfishing (sometimes game fishing) is recreational fishing where the primary reward is the challenge of finding and catching the fish rather than the culinary or financial value of the fish's flesh. Fish sought after include tarpon, sailfish, mackerel and many others. Fishing industry The fishing industry includes any industry or activity concerned with taking, culturing, processing, preserving, storing, transporting, marketing or selling fish or fish products. It is defined by the FAO as including recreational, subsistence and commercial fishing, and the harvesting, processing, and marketing sectors. The commercial activity is aimed at the delivery of fish and other seafood products for human consumption or use as raw material in other industrial processes. There are three principal industry sectors: The commercial sector comprises enterprises and individuals associated with wild-catch or aquaculture resources and the various transformations of those resources into products for sale. The traditional sector comprises enterprises and individuals associated with fisheries resources from which aboriginal people derive products following their traditions. The recreational sector comprises enterprises and individuals associated with the purpose of recreation, sport or sustenance with fisheries resources from which products are derived that are not for sale. Commercial fishing Commercial fishing is the capture of fish for commercial purposes. Those who practice it must often pursue fish far from the land under