The sturgeon is the largest freshwater fish in the world. There are 24 species of sturgeon worldwide, the most famous of which is the beluga sturgeon of the Caspian Sea, prized for its caviar.

"Fish and plant species found only in the Caspian Sea have reached the stage of complete extinction," he said, according to Anadolu. "The Caspian sturgeon, which is 200 million years old ...

The species subject to capture include the Caspian seal ... The water level of the Caspian Sea continues to drop, leading to a steady decrease in fish stocks. Once the world's fourth-largest ...

Beluga sturgeon are native to the Caspian ... species, like sterlet and sevruga, which take less time than beluga to mature. The sturgeon is removed from the tank and placed on ice. The fish ...