Question: is all caviar from sturgeon?
Answer: Traditionally, the term caviar refers only to roe from wild sturgeon in the Caspian Sea and Black Sea (Beluga, Ossetra and Sevruga caviars). Depending on the country, caviar may also be used to describe the roe of other species of sturgeon or other fish such as salmon, steelhead, trout, lumpfish, whitefish, or carp.