Tuna stocks have declined worldwide to an alarming extent. While searching for fish for sushi, my girlfriend didn’t allow me to buy tuna because “she wants our children to be able to eat it as well”. I agree, but I think that, hopefully, market economics will kick in and make it more expensive to buy, so less people will buy it until supplies replenish.
But in case that doesn’t work as markets aren’t perfect, there is an international meeting going on focusing on tuna stocks.