Tuna being lifted from a fishing boat. From www.shutterstock.com March 20, 2017 Want to eat fish that’s truly good for you? Here are some guidelines to reeling one in Keri Szejda, Arizona State University Recently revised guidelines on mercury in seafood suggest cutting bait on some fish but making sure you eat other types. Then there are omega-3s to consider. Here are some tips to help you choose.