With the world environments changing the way they are and the culture becoming more and more removed from personal food production and the sports of hunting and fishing, we are becoming more and more dependent for the fish that we consume to come from big corporate production. Many people don't even realize what fish production is about and what the downside of farmed fish is all about.
I came across an interesting article that I think helps to address the subject and gives us a good insight as to what the considerations should be regarding fish consumption, eviromentally as well as from a culinary perspective. Here is a quote from the article that I think is especially interesting : "Who buying fish today is cognizant that October mackerel are the most succulent or that pollock are better after mid-summer?" This is just one thing to consider and the article brings up other interesting concerns.
I hope you find the subject interesting: http://e360.yale.edu/feature/how_fisheries_can_gain_from_the_lessons_of_sustainable_food_/2372/