Beluga Caviar is the most expensive food item in the world, costing up to $5,000 per kilogram. Caviar is fish roe (eggs) and this particular brand comes from the Beluga Sturgeon, found mostly in the Caspian sea. It can take up to 20 years for a Beluga Sturgeon to reach its maximum size and they can weigh up to 2 tonnes. The eggs are the largest of the fish eggs used for caviar