Salmon, tuna, and other fish are loaded with heart-healthy omega-3 fatty acids, so they must be good for you, right? Not so fast—some types of fish have more mercury than others, and others are harvested from the ocean or farmed in a way that’s harmful to the environment. Now, a new list has come to the rescue: IIt sorts through the confusion by rating fish in terms of levels of omega-3 fatty acids, mercury and other toxins, and in terms of their sustainability or ocean-friendly status. Read the original article on Health.com