FAO considers 1/4 of world marine fish stocks to be overexploited, thus unsustainable
"Unfortunately, the United Nations Food and Agriculture Organization (FAO) considers about one-quarter of assessed world marine fish stocks to be overexploited, meaning that these stocks are being fished at a level that is not sustainable in the long run."
R. Quentin Grafton, Tom Kompas, "Fisheries Forever," Solutions (2013): 47.