The article went on to note that halibut and red snapper bought from local Washington state stores had mercury at levels high enough that children and women of childbearing age should eat no more than one meal a week of the fish, based on EPA guidelines. And chinook salmon topped the list for the most PCBs, or polychlorinated biphenyls, a long-banned chemical suspected of causing cancer and impairing brain development.

• On January 24, 2006, the Honolulu Advertiser reported that big-eye tuna, often sold as ahi tuna and served in sushi, contains higher levels of mercury than previously thought according to revised data from the FDA. The FDA also found high mercury levels in samples of Chilean sea bass.

No federal warnings exist for ahi tuna or Chilean sea bass, even though the average mercury level detected in the FDA tests was above the average in albacore tuna, which the government tells pregnant women and young children to limit eating.

• On January 26, 2006, in a report on canned tuna mercury, the Chicago Tribune found that newly released government data provide the best evidence to date that some cans of light tuna -- one of America's favorite seafoods -- contain high levels of mercury. Testing by the Food and Drug Administration found that 6 percent of canned light tuna samples contained large amounts of mercury.