I found a great website to learn about buying and eating safe fish where ever you live or travel. What fish is safe and not. Recommendations on what to not eat at a sushi bar and other restaurants. http://www.montereybayaquarium.org/cr/seafoodwatch.aspx

Go to this link to download a pocket guide to help you choose ocean-friendly seafood wherever you live or travel.
http://www.montereybayaquarium.org/cr/cr_seafoodwatch/download.aspx

They even have a Seafood Watch Ap for your phone or Ipad
http://www.montereybayaquarium.org/cr/SeafoodWatch/web/sfw_iPhone.aspx