Erik Loomis wants us to consider the consequences of overfishing:
The idea that it is somehow more responsible to eat fish rather than other meat has little relation to reality. While it is true that fish have far less of a carbon footprint than beef, the fish industry is literally wiping out the entire ocean. Some of the problem is overfishing of species. But much of the problem is also the widespread extermination of large ocean life, including sharks, dolphins, turtles, and birds, through getting caught in the industrial technology used to give us cheap cans of tuna.
(Chart by Daniel Fromson)