Sturgeon caviar is delicious. Caviar, also known as roe sauce, means fish eggs in Persian. Strictly speaking, only sturgeon eggs can be called caviar, among which caviar produced in the Caspian Sea bordering Iran and Russia has the best quality. Not all sturgeon eggs can be made into caviar. There are more than 20 different sturgeons in the world, among which only the eggs of Beluga, oscietra and Sevruga are made into caviar. The highest-grade Beluga can produce less than 100 fish a year, and only Beluga over 60 years old can make caviar.