http://articles.mercola.com/sites/articles/archive/2004/03/31/mercury-fish-part-nine.aspxResearch has shown that pregnant women should limit their intake of swordfish, tuna, shark and king mackerel because of their high levels of mercury, which can cause brain damage in unborn children. The accumulation of toxic mercury, methyl mercury, foundenCommunityServer 2008.5 SP1 (Build: 31106.3070)