Nearly all fish and shellfish contain traces of mercury. For most people, the risk from mercury by eating fish and shellfish is a health concern. Fish and shellfish contain high levels of mercury that can also harm an unborn baby or young child’s developing nervous system.
The risks from mercury in fish and shellfish depend on the amount of fish and shellfish eaten and the levels of mercury in the fish and shellfish. Therefore, the Food and Drug Administration (FDA) and the Environmental Protection Agency (EPA) are advising women who may become pregnant, pregnant women, nursing mothers and young children to avoid some types of fish and eat fish and shellfish that are lower in mercury.