I am a big fan of sushi. There are great places in my area to eat this edible art. With its growing popularity, many fish are at risk of being overfished, especially bluefin tuna. A plethora of rolls at most sushi restaurants contain bluefin tuna. I encourage you to avoid these rolls. I have been skipping the bluefin tuna for about 6 months now, and it has not hampered my eating experience.
Check out this link for more information regarding the overfishing of bluefin tuna and a list of more sustainable restaurant choices.