Sevruga caviar Sevruga caviar Sevruga caviar is one of the highest priced varieties of caviar, eclipsed in cost only by the Beluga and Ossetra varieties. It is harvested from a variety of critically endangered sturgeon fish species, that are known for their small, grey colored eggs. In eastern Europe, it is harvested from the Sevruga sturgeon ("Acipenser stellatus"), the Sterlet sturgeon (Acipenser ruthenus) and the Siberian sturgeon ("Acipenser baerii"), which are native to the Caspian Sea and the surrounding rivers. Sevruga is the smallest of the caviar-producing sturgeons. It can grow as far as 150 lbs. in weight and 7 feet in
USS Sterlet (SS-392) gun. On 31 October, she made a night surface attack on a tanker previously damaged by and apparently sank it with a spread of six torpedoes. "Sterlet" then joined "Trigger" in escorting the damaged into Saipan. From there, "Sterlet" put to sea on 10 November with six other submarines in a coordinated attack group. On the night of 15 November, she, "Trigger", and engaged in a gun duel with an enemy sub chaser. "Sterlet" completely depleted her supply of five-inch (127 mm) shells in the battle and was forced to sink the enemy craft with torpedoes early the following morning.