Heading the list of the most most expensive food in the world is bluefin tuna. The hefty price tag can reach over $5,000 per pound.
Something of an acquired taste, caviar is expensive because fish sturgeon eggs have to be harvested by hand. However, virtually all sturgeon eggs come from fish farms. A single teaspoon of Strottarga Bianco can cost as much as $37,000! In general, the paler the caviar color, the more expensive caviar it is.