The film shows how the German economy is supplied with sea fish: Hamburg-Altona fishing port. Wesermünde-Geestmünde fishing port. Preparations for departure. Departing fishing trawlers. Hauling in and processing the catch. Unloading the cargo in the fish market. Inspection, weighing, and sorting of the fish. Auction, packaging, and processing. Overview of important sea fish from German catches. Transport in special wagons to the German interior.