Originally Posted by ChefJune
There is very little farmed fish that is healthy to eat, regardless of where it is raised. US raised catfish and Norwegian salmon being exceptions.
Another exception is Barramundi, a white fleshed Aussie species that has taken very well to farming. It has an excellent, buttery flavor and good levels of omega-3.
It's not very well known yet, though I predict it will be. My local co-op has only recently started getting it in. If you run across it, make sure it's from the US or Australia.