Fish production can be classified based on whether the fish are finned or shellfish, and whether they come from natural resources through capture fishing or culture fishery. Marine fisheries catch fish from the sea using nets and boats, and yields are increased using modern locating equipment. Inland fisheries include freshwater fish farmed in ponds along with rice crops, and include species like rohu and grass carp. Beekeeping provides additional income from honey and wax production. Honeybees are classified by species, with Italian bees producing the most honey and staying in hives longer to breed well.