Bordered by the Pacific Ocean, the Gulf of Mexico and the Caribbean Sea, Mexico has a rich biological diversity in its marine areas and inland waters. Along Mexico's coastline, tropical and subtropical marine currents favour the existence of a wide variety of fishery resources, many of which command high commercial values. The regions in which marine fishing takes place in Mexico are characterised by a high diversity in terms of bio-geographical factors and social aspects, reflecting strong regional differences. Figure 9.1 provides an overview of the marine biodiversity in different areas of the marine environment of Mexico. The coastal lagoons, reservoirs and ponds of the inland areas support important wild capture and aquaculture production activities.