Perhaps the most grotesque form of fish farming is the ranching of bluefin tuna, a delicacy that may sell for as much as $860 a kilo.

• 也许最奇怪的养鱼场是蓝鳍金枪鱼大养殖场。蓝鳍金枪鱼做成的佳肴可以买到每公斤860美元。