Caviar sturgeon from the Sea of Azov began reaching the tables of aristocratic and noble Byzantine Greeks in the 10th century, after the commencement of large-scale trading between the Byzantine Empire and Kievan Rus'. The main types of caviar are Beluga, Sterlet, Kaluga hybrid, American osetra, Ossetra, Siberian sturgeon and Sevruga. The rarest and costliest is from beluga sturgeon that swim in the Caspian Sea, which is bordered by Iran, Kazakhstan, Russia, Turkmenistan, and Azerbaijan. Wild caviar production was suspended in Russia between 2008 and 2011 to allow wild stocks to replenish. Azerbaijan and Iran also allow the fishing of sturgeon
USS Sterlet (SS-392) turned her radar back on. The screen was clear; she had escaped. The submarine had one more anxious moment during the patrol, when she encountered a Q-ship screened by a small escort. She launched six torpedoes at the "freighter," which disconcertingly turned and closed "Sterlet". She succeeded in evading that aquatic chameleon and returned to Midway on 10 June. "Sterlet"’s final war patrol commenced on 5 July when she departed Midway for the vicinity of Kii Suido and Bungo Suido. Except for one occasion when she shelled oil storage tanks and a power plant near Shingu on Honshū, this whole