Caviar is basically the fresh and only slightly salted roe of the female sturgeon. The sturgeon is a prehistorical migratory fish that has roamed the cold waters of the northern hemisphere for over 250 million years. Depending on the type of sturgeon, size and weight can vary. Some types (e.g. Huso Huso ‘Beluga’, Acipenser Transmontanus) can grow to over 1980 lbs, while others (e.g. Russian sturgeon, Siberian Sturgeon) average around 130 lbs. Interesting to know...