Bluefin tuna certainly faces severe existential threats. That much is no longer in doubt. Sure, Pacific bluefins are not officially endangered -- but Southern and Atlantic ones are. Indeed, bluefin experts are quickly shifting their conversation away from the question of whether or not the species are endangered to the more difficult one of what to do in light of the fact that they are.

The bigger the tuna the more they pay for these guys. I love sushi but I am concerned about the threat to these magnificent fish. I love tuna as well, but what then should we do. Some sushi stores are not selling bluefin tuna and for good reason. A caught tuna recently sold for $736,700.