Reel in some fish for your diet but keep it safe.

Byline: Jan Jarvis

During these diet-conscious days, a can of tuna or a plate of fresh shrimp has become a popular low-calorie and healthful meal.

But some people _ namely women who are pregnant or nursing or young children _ need to think twice before they chow down.

The problem: high levels of mercury that might harm an unborn baby or young child's nervous system. Although mercury is found in nearly all fish, the larger ones are a concern because they that have lived longer and have the highest levels of mercury.

The Food and Drug Administration and the Environmental Protect Agency have released a consumer advisory warning about mercury in…