Grimsby is strongly linked with the sea fishing industry, which once generated wealth for the town. At its peak in the 1950s, it was the largest and busiest fishing port in the world. As a result of the Cod Wars with Iceland, this industry has been in decline for many years. In 1970 around 400 trawlers were based in the port, by 2013 only 5 trawlers remain based there. By comparison, 15 vessels are used to maintain offshore wind farms in the North Sea. The town still has the largest fish market in the UK, but most of what is sold
Cod fisheries needed and areas where opposite observations were gaining press attention. In effect, DFO's opposition to a listing compromised its ability to carry out its conservation mandate. The ban on Canadian cod fishing was partly lifted in 1997 by the Minister for DFO just ten days prior to a federal election, despite that independent Canadian scientists and the International Council for the Exploration of the Sea doubted there had been sufficient recovery. In general, depleted populations of cod and other gadids do not appear to recover easily when fishing pressure is reduced or stopped. In 2003, COSEWIC in an update designated