The fish worth more than your house

A bluefin tuna sold for $396,000 this week, a record price. Caught off the north coast of Hokkaido with a longline, the fish was sold at auction in Tokyo to high-end sushi restaurants. Is this a valuable fish or just costly advertising? Does it prove that bluefin are going extinct? Note that this is not the Atlantic bluefin that has been much in the news over the last year. Northern Pacific