Fishing is an enormous industry. The Food and Agriculture Organization of the United Nations (FAO) estimated that in 2012, global production of fish (including crustaceans and mollusks) reached 158 million metric tons. Approximately 91 million metric tons came from wild capture, a number that has remained relatively constant since 2006. Roughly 67 million metric tons come from aquaculture, or the industrial farming of fish. This number, unlike that for captured fish, has nearly doubled since 2003!