Caviar fish or Sturgeon are among rare species dating back to Jurassic age, about several hundreds of years ago. Hence, these species are considered living fossils having been developed through a phylogenetic process. Of all the most original homelands of this fish, one could mention the Caspian Sea, while they could be found sporadically in some areas in Europe and America. It is the egg of Sturgeon which makes it an invaluable high-price food.
This fish is categorized and subcategorized into 27 groups of which 5 species reside in the caspian sea. The sea encompasses 93 percent of Caviar fish in the world. Unauthorized and excessive haunt, as well as water pollution, has let inhibitory regulations asserted by CITES.