Tuna will be raised on farms

the PopMechanics Brain Trust : scientist
Ah, the bluefin—powerful, dangerous, graceful ... and delicious served raw. Long reproduction cycles and a migratory lifestyle make it hard to tame, though. Pioneering fish farms in Mexico are now raising the species, fattening tons of fish in massive underwater pens. Similar efforts are underway in the U.S., Japan, and the Mediterranean

Popular mechanics, (2012) "110 Predictions For the Next 110 Years", [online], Available: http://www.popularmechanics.com/technology/engineering/news/110-predictions-for-the-next-110-years