Beluga caviar at Agrinet Explore more: https://www.tasteatlas.com/caviar Beluga caviar, derived from the roe of the beluga sturgeon, is one of the most prized and expensive types of caviar. Found primarily in the Caspian Sea and the Black Sea, it is traditionally produced in countries like Russia, Iran, and Azerbaijan. Renowned for its large, delicate eggs and buttery flavor, beluga caviar is commonly served on blinis, toast points, or with crème fraîche in fine dining settings. Due to overfishi