When people ask us which seafood is sustainable, it's hard to give such a pithy response. But if you really pressed us for it, this is what we might say: "Eat wild seafood. Not too much of the big fish. Mostly local."
Becoming a pescetarian was one of the most important and life changing decisions that I've ever made; and I made it at age 14. And I have not eaten meat since then except for fish, and I don't plan to for the rest of my life.