Fishing is the activity of catching fish. Fishing techniques include netting, trapping, angling and hand gathering. In addition to providing food through harvesting fish, modern fishing is both a recreational and professional sport. Recreational and sport fishing is fishing for pleasure or competition. Recreational fishing has conventions, rules, licensing restrictions and laws that limit the way in which 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. The practice of catching or attempting to catch fish with a hook is known as angling. In angling, it is sometimes expected or required that fish be returned to the water (catch and release).