I ate bluefin salad sandwiches every day for over a year. You are allowed to catch one per year for recreational purposes. You can't sell the meat though. What the hell else are you going to do with 300lbs of frozen tuna in a chest freezer? Bluefin doesn't even taste very good.
If you want a shit ton of bluefin tuna, go to north carolina in the winter. For about $1000, you can hire a boat and catch one. You'll have 200-400lbs of tuna, and and entire belly of o-toro. A year later, you will never want to eat tuna again.