It's a reference by danmand to the fishing industry of Denmark.
The fishing industry in Denmark operates around the coastline, from western Jutland to Bornholm. While the overall contribution of the fisheries sector to the country's economy is only about 0.5 percent, Denmark is ranked fifth in the world in exports of fish and fish products. Approximately 20,000 Danish people are employed in fishing, aquaculture, and related industries.[1]
The Danish fishing fleet is noted for its economic democracy: the value of the catch is shared by everyone on the ship according to a pre-set scale, and this system unites the whole crew's interest in returning the largest possible catch. Fish waste is sold to Danish mink farmers. The mink pelts are sold at the world's largest fur auctions, held annually in Copenhagen.[3]
I found the mink reference interesting in light of this week's story about millions of mink in Denmark needing to be killed.