Caviar is a delicacy made from the salt-cured eggs (roe) of certain species of sturgeon, a type of fish. It is known for its rich, briny flavor and is often considered a luxury food item. Caviar comes in various grades and colors, with the most prized and expensive being the Beluga, Osetra, and Sevruga caviar, which are traditionally harvested from sturgeon in the Caspian and Black Sea regions.