Ossetra dwells another type of sturgeon, Siberian sturgeon ("Acipenser Baerii"), which is farmed all over the world because it can adapt to a wider range of habitats. It begins to produce caviar faster than "Acipenser gueldenstaedtii". Throughout the entire history of black caviar consumption, reference to Ossetra was made only to the fish that was caught first in Imperial Russia, then the USSR, and now in the Russian Federation. Today, Caspian Ossetra is facing extinction in its native habitat. Farming sturgeon is the only way to continue the production of high-quality caviar. Continuous drastic declines in natural sturgeon populations over the
USS Sterlet (SS-392) October and unleashed four torpedoes on small convoy. Results: four misses. Not to be denied, "Sterlet" made another approach on the convoy. This time, four of the six fish she launched scored. Three hit a large gasoline tanker, and the fourth plowed into a freighter. The tanker, "Jinei Maru", is known definitely to have gone down. "Sterlet" spent the remainder of the day evading the attacks of the escorts. That night, she allowed a hospital ship to pass unmolested. She attacked a small freighter with four torpedoes on 29 October, but had to surface and sink it with her deck