If you're looking at a whole fish, the gills should be dark red, not dull brown, and the eyes should be clear and not cloudy. Jeff Ludwin More Quotes by Jeff Ludwin More Quotes From Jeff Ludwin Preservatives and other additives are often added to frozen varieties to help maintain their quality, scallops and shrimp, for instance, are treated with sulfites to prevent them from deteriorating. Jeff Ludwin health-news Many species are migratory, meaning they're available fresh in various regions only at certain times of the year. Jeff Ludwin health-news
