Sevruga caviar as saltier, but it can vary depending on the origin of the fish. The caviar is packaged and sold in red tins. A rare type of caviar known as Imperial Caviar, from the Sterlet sturgeon (Acipenser ruthenus), a now nearly extinct species of sturgeon from the Caspian Sea, is sometimes incorrectly labeled as Sevruga, as well as the even rarer Golden Caviar from the albino Sterlet, the caviar being yellow in color. “Pressed sevruga caviar” can also be found, made of a blend of Osetra and Sevruga caviar that has been heated in a saline solution. Sevruga caviar Sevruga caviar
USS Sterlet (SS-392) January 1953, when she was deployed to the Far East. On this cruise, she joined in hunter-killer exercises, visited Chichi Jima, Atami, Japan, and Buckner Bay, Okinawa; and conducted photographic reconnaissance on Marcus Island. She returned to San Diego, California, on 23 June and resumed West Coast operations. In August 1954, "Sterlet" exchanged crews and homeports with . On 13 September, she reported for duty to Submarine Squadron 1 at Pearl Harbor. For the remainder of her Navy career, "Sterlet" was home ported at Pearl Harbor. Between 1954 and 1968, she alternated operations in the Hawaiian Islands with nine deployments