Price signs in euros and Latvian lats sit on tins of canned fish, including sardines, for sale at the central market in Riga, Latvia. (Photographer: Jason Alden/Bloomberg)
(Bloomberg Businessweek) -- Of all the things millennials have killed over the years, the slow death of seafood in a can may have provoked the least amount of hand-wringing. When a 2016 U.S. Department of Agriculture report noted that tinned-tuna sales had fallen 42 percent over the previous three decades, most people seemed to agree it was for the best.