This family of sturgeons is one of the most extensively fished for their eggs. Every year, in the Sea of Azov, Russia puts back millions of farmed juveniles. However, this is insufficient to curtail the danger to this species. In this same family there are the Russian sturgeon or Ossetra (Caspian Sea, Black Sea and Sea of Azov), the Persian sturgeon (Caspian Sea and Black Sea), the Sevruga (greatly appreciated for its eggs) and the Bare-bellied sturgeon (named after its bony badges which disappear with age) whose intensive over-fishing in the Caspian Sea is worrying.