Is it safe for a 3 year old to eat tuna?

Mercury in fish: We know how good fish can be for our overall health, but some have higher levels of mercury than others and should be eaten in moderation. Bluefish, grouper, &sea bass have moderate levels; highest levels are in mackerel, marlin, orange roughy, shark, swordfish, tilefish and certain tuna. Opt for low mercury alternatives (salmon, sardines, herring, sole, tilapia, whitefish, whiting, flounder)

Yes: Tuna is a good source of protein and vitamins for children, especially, if he or she refuses to eat beef or chicken