But some types of seafood - particularly large , predatory fish such as shark , swordfish , king mackerel and tilefish - may contain high levels of mercury .
但是一些海鲜,特别是大型、食肉动物,比如鲨鱼、剑鱼、大西洋马鲛和方头鱼,可能还有高浓度的汞。
The epa recommends consuming no more than 12 oz. of salmon or light tuna per week ( 6 oz. of albacore tuna ) , and to entirely avoid swordfish , shark , tilefish , and king mackerel .
The agency advises women who are pregnant , nursing , or of childbearing age , and young children to limit their consumption of certain types of fish and avoid eating shark , swordfish , king mackerel , or tilefish altogether because they contain high levels of mercury .