in income will tend to reduce the consumer expenditures of families working in the fishing industry. IUU harvests may be brought to market at a lower price as unfair competition to the same products from the regulated supply or as a mislabeled competing product. In either situation this illegal unregulated contribution to the market may lower the overall quality and price of products available, thus creating an economic burden on harvesters following the laws and regulations. IUU fishing can have a significant impact on the sustainability of both the targeted species and the ecosystem. Fishing generally has the capacity to damage fragile marine ecosystems and vulnerable species such as coral reefs, turtles and seabirds. In fact, all eight sea turtle species are now endangered, and illegal fishing and hunting are two major reasons for their destruction. Regulating legitimate fisheries is aimed at mitigating such impacts, but IUU fishers rarely comply with regulations. This may reduce future productivity and biodiversity and create imbalances in the ecosystem. This may lead to reduced food security in communities heavily dependent on fish as a source of animal protein. IUU fishing can also lead to increased pressure on endangered fish species. IUU fishing can directly affect the population of fish species by increasing the number of fish caught within the population in spite of population management efforts by the international community. Indirectly, the substitution (mislabeling) of IUU caught fish for popular, but threatened or endangered species, increases the perceived supply of these species, thus decreasing the price and increasing the demand for the fish species. Certification and labeling Mandatory product certification and catch documentation are increasingly part of fishery monitoring and enforcement, and to exclude IUU products from consumer markets. Certification is also used for timber and for diamonds, which have analogous enforcement problems. Labels can reward harvesters and supply chains which honor regulations. Labeling may also provide accountability for adaptive management planning, as well-managed fisheries may provide higher quality products and more stable economics for producers. The use of certification or catch document schemes is encouraged in the FAO's International Plan of Action on IUU Fishing. Several RFMOs include them, including CCAMLR's Catch Documentation Scheme for Toothfish, CCSBT's Trade Information Scheme for Southern Bluefin Tuna and ICCAT's Bluefin Tuna Statistical Document Programme. Similar systems are applied at a national level, including the USA's Certification of Origin of Tuna and Tuna Tracking and Verification Systems,