Why Bluefin Tuna Is So Expensive

A tuna once sold for $1.8 million, but you can get cans of tuna fish for less than $2 at the grocery store. So, what's the difference? Bluefin tuna can be very expensive depending on where you buy it and which part of the fish you are eating. We spoke with the chef at Shoji in New York, Derek Wilcox, to find out why the fish is so expensive.