The sturgeon fish has been around for more than 200 million years and is found in the northern regions of Europe, Asia, and North America. The sturgeon has a fine-grained hide, reduced scalation, mostly cartilaginous skeleton, upturned tail fins, and a mouth set back on the underside of the head. It has feelers and vacuum-like mouths for rooting out food on the sea bottom. Their food consists mostly of crayfish, snails, larvae, and other small fish.
Aside from caviar, smoked sturgeon is also considered a delicacy in many regions. Because of the popularity of the fish and the caviar produced from its roe, Russia and some other countries surrounding the Caspian Sea have undertaken strict conservation measures to save the threatened Russian sturgeon from extinction.