One of the most dangerous yet confusing toxic pollutants is mercury in seafood. Mercury is very bad for developing fetuses and children, and seafood is very good for them. But mercury is in all seafood. Like I said: confusing.
Named after the Italian island Sardinina, sardines are definitely the herring family's hippest and healthiest member. A frequent ingredient in Mediterranean and Italian cooking, they offer a briny, salty burst of flavor that enriches many a dish.
A recent statement sounded alarms over declining Pacific herring stocks. Why such a big fuss over such tiny fish? As well as constituting the basis for idiosyncratic pizzas, these fish are critical forage for a great number of other marine species.