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) escort. The setup was hasty at best. All four missed, and she prudently opened range to reload and prepare for another attack on the damaged freighter still afloat. As she approached, her quarry was dead in the water, down by the stern, and partially enveloped by smoke. Two of the escorts were thrashing about the surrounding waters, indiscriminately shooting and dropping depth charges. At 22:35, one of them passed between "Sterlet" and her victim. The submarine shifted her sights on him and, four minutes later, sent three torpedoes streaking at him. The frigate sighted the wakes, immediately turned into them,