According to the U.S. Food and Drug Administration (FDA), Chilean Sea Bass has about 0.354 PPM (parts per mille or thousand) which is higher than salmon (0.022 PPM) and about the same as as Albacore Tuna (0.358 PPM). King Mackerel and Swordfish has much higher levels of mercury at 0.73 and 0.995 PPM respectively.