Sterlet Sterlet The sterlet ("Acipenser ruthenus") is a relatively small species of sturgeon from Eurasia native to large rivers that flow into the Black Sea, Azov Sea, and Caspian Sea, as well as rivers in Siberia as far east as Yenisei. Populations migrating between fresh and salt water (anadromous) have been extirpated. Due to overfishing (for its flesh, caviar, and isinglass), pollution, and dams, the sterlet has declined throughout its native range and is considered vulnerable by the IUCN. Restocking projects are ongoing, and it has been introduced to some regions outside its native range, but the latter have generally not
USS Sterlet (SS-392) the lookouts sighted smoke; and, by 21:53, the submarine was in position to launch a night surface radar attack. She launched six torpedoes, three at each freighter. Two minutes later, one of the escorts peeled off and made for "Sterlet". She immediately went right full rudder, all ahead at flank speed. In another two minutes, two torpedoes plowed into each of the two targets—four explosions within 20 seconds. At 22:05, the enemy frigate began random depth charge attacks. Three minutes later, the smaller of the two targets sank by the stern. At 22:11, "Sterlet" unleashed four "fish" at the pursuing