Industrial fishing is for industrial use of producing fish oil and fish meal. Chile is close to large forage fisheries which supply fish meal for salmon aquaculture. Several species are fished commercially and processed into fish meal. Past commercial uses included fish oil and fish meal. The catches are not food fish, but processed into fish meal. They are caught and used as bait or may be ground down for fish meal. Their products included fish oil, fish meal, and proteins. The fish is usually not marketed fresh, but processed into fish meal and oil. It is possible to formulate fish meal to increase unsaturated fatty acid. Demand for fish meal has increased accordingly, but harvests are regulated and supply cannot expand. In Africa, fish meal is especially scarce and expensive. In some Western countries it is used for fish meal and pet food. Factory trawlers may process fish oil and fish meal and may include canning plants. "Mortierella" can grow on yeast extract, fish meal, or other media; rich in nutrients. Fish meal is primarily used as a protein supplement in compound feed.