
1) Caspian Sea sturgeon 2) Choice Caspian sturgeon 3) Small sturgeon 4) Source of excellent caviar 5) Whence caviar comes
Found on
https://www.crosswordclues.com/clue/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,...
Found on
http://en.wikipedia.org/wiki/Sterlet

• (n.) A small sturgeon (Acipenser ruthenus) found in the Caspian Sea and its rivers, and highly esteemed for its flavor. The finest caviare is made from its roe.
Found on
http://thinkexist.com/dictionary/meaning/sterlet/

(from the article `chondrostean`) ...is found along the east coast of North America from the St. Lawrence River to the Gulf of Mexico. A. gueldenstaedti occurs in western Russia east ... ...of Russia and occurs eastward to Lake Baikal. It is about the same size as the common sturgeon and is found particularly in the rivers feeding the ....
Found on
http://www.britannica.com/eb/a-z/s/160
Ster'let noun [ Russian
sterliade .]
(Zoology) A small sturgeon (
Acipenser ruthenus ) found in the Caspian Sea and its rivers, and highly esteemed for its flavor. The finest caviare is made from its roe.
Found on
http://www.encyclo.co.uk/webster/S/195

HMS Sterlet was a British Sealion Class submarine of 715 tons displacement launched during the early 1940's and sunk during the Second World War. HMS Sterlet was armed with one 3-inch gun; one 20 mm anti-aircraft gun; three machine-guns; six 21-inch torpedo tubes in the bow and one external 21 inch torpedo tube. She had a top speed of 14.5 knots su...
Found on
http://www.probertencyclopaedia.com/browse/RSA.HTM

a small sturgeon, Acipenser ruthenus, of the Black and Caspian seas, valued as a source of caviar.
Found on
https://www.infoplease.com/dictionary/sterlet
No exact match found.