I used to think that raising them on a farm protected bottom-feeders, such as catfish and flounder, from industrial contaminants that have settled onto river bottoms. Such is not the case if the article I have enclosed is correct. The low prices at supermarket fish counters mean that we can afford to make fish a big part of our dietary protein, but after reading this article, I am afraid to buy any. The article you enclosed is critical of fish farming, pointing to widespread dangers from unsanitary conditions, diseases, parasites and the use of antibiotics and toxic chemicals. It is a fear-provoking, unbalanced piece.
Studies are generally supportive of the raising of fish in water-based pens.
I say generally because this system attempts to take a natural process and reproduce it in a semi-enclosed system. Nature, however, can be unpredictable, so a fish farm is not immune to problems. The key is that there are strict quality-control standards that need to be observed. If and when there are problems, treatment options are followed by waiting periods to assure that fish are of good quality before they are harvested. When things run well, the fish that come to market are safe to eat, and they look and taste great.