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) 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