A virus called infectious salmon anemia is sweeping through Chile's fisheries, bringing attention to the condition of the country's third-largest export industry. On expansive salmon farms, fish are bred in crowded underwater pens. Fish poop and food pellets contaminate the water. As many as 1 million nonnative salmon escape each year, gobbling native species and traveling as far as Argentina. The fish are treated liberally with antibiotics, some of which are prohibited for use on animals in the U.S. -- but 29 percent of Chilean exports end up in American grocery stores. Read More »


