The average mercury content of tuna rises with the age and size of the fish. Wild Planet only sources pole and line as well as troll caught tuna, which are the younger and smaller, migratory tuna that are caught near the surface. These fish (3-5 years of age) have accumulated lower levels of mercury as compared to older and larger tuna (6-12 years old) which live at much lower depths and in a different part of the Pacific Ocean. Our annual testing protocol, summarized in the accompanying document, verifies that Wild Planet tuna products average 0.067PPM for Skipjack (which is 14 times lower than the FDA “Action Limit” of 1.0PPM), 0.137PPM for Yellowfin (which is 7 times lower than the FDA “Action Limit” of 1.0PPM), and 0.17PPM for Albacore (which is six times lower than the FDA “Action Limit” of 1.0PPM). Wild Planet has been controlling the average and range of mercury in its products since 2004 and continues to do so. Please read the Wild Planet perspective on this topic here: The Wild Planet Perspective: Mercury Content In Tuna. For information on FDA fish consumption recommendations based on mercury screening values, you may also view these three individual charts, each tailored for Adults, Children, or Pregnant Women. Watch Mercury Video