How many of us think about fish when we talk about local food? In Southwestern Ontario, we have a vibrant sport fishing sector, but we also have a huge commercial fishing sector. Article contentWheatley is the largest fresh water commercial fishing port in the world. The head office of the Ontario Commercial Fisheries’ Association (OCFA) is in Blenheim. The OCFA is proud of their modern role as suppliers of nutritious, wholesome fish products, sustainably harvested from Ontario’s waters.