Ready-to-eat, chilled seafood, such as raw sushi, sashimi and oysters or pre-cooked prawns and smoked salmon can be risk for pregnant women because of listeria . Necessary cookies are absolutely essential for the website to function properly. But opting out of some of these cookies may have an effect on your browsing experience. Lewine, H. (2013, July 12). Safe Catch individually tests each and every fish for mercury levels. Due to their high mercury levels, there are four types of fish that should be avoided while pregnant or breastfeeding. Yet, fish is a healthy source of lean protein, healthy fats, vitamins, and minerals. //