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Paul Sutherland

A purse seiner net is used to haul tuna to coastal feeding pens in what is sometimes called the Southern, or Antarctic, Ocean. Giant bluefin tuna, treasured for sushi, can grow to 12 feet (3.7 meters) in length, weigh 1,500 pounds (680 kilograms), and live for 30 years. They once migrated by the millions throughout the Atlantic Basin and the Mediterranean Sea, but are now experiencing significant declines. By the mid-1990s, stocks of southern bluefin tuna had been fished to between 6 and 12 percent of their original numbers in the South Pacific and Indian Oceans.

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