Dear Heloise: I've heard that a lot of the fish we buy might be "farm-raised." What does that mean, and are there any differences from fish caught in our oceans? Esther J., Mulvane, Kan.

Dear EarthTalk: I thought “farm raised” was the way to go when buying fish, to avoid mercury contamination. But are there other concerns about farm-raised that make some fish a poor choice for ...

China, the birthplace of aquaculture, produces more farm-raised fish protein than the rest of the world combined. Over a span of 4000 years the Chinese have perfected the practice of pond poly ...