Sturgeon caviar" (Acipenser gueldenstaedtii) occupies a place of honor in the black caviar rankings. Many gourmets claim that it is Russian sturgeon caviar that is truly the best. The color of Russian sturgeon caviar ranges from dark brown to golden, but sometimes it is also dark gray. This type of caviar has a distinct, almost nutty taste. We would like to draw your attention to the fact that the Russian sturgeon is the name of the sturgeon species, not the country of origin.