sterlet

A small sturgeon (Acipenser ruthenus) native to rivers flowing into the Black and Caspian Seas, having roe that is used for caviar.

A species of sturgeon, Acipenser ruthenus.

A small sturgeon (Acipenser ruthenus) found in the Caspian Sea and its rivers, and highly esteemed for its flavor. The finest caviar is made from its roe.

A common Eurasian species of sturgeon (Acipenser ruthenus), one of the smaller species.