里海是世界最大的内陆水域,也是鲟鱼的故乡。俄罗斯与伊朗间的海域蕴涵鲟鱼主食的特殊藻类,俄罗斯的窝瓦河注入里海形成的三角洲是鲟鱼溯河产卵的地区。渔民在春秋两季捞捕雌鱼,取卵制作鱼子酱。十二世纪时,俄罗斯鱼子酱已远近驰名。苏联时期,里海鲟鱼产出的鱼子酱占全球90%,这个大数 Caspian Sea is the largest inland water in the world and the hometown of sturgeons. The special algae that contain the staple food of sturgeon in the sea area between Russia and Iran, and the delta formed by the Russian Voivod River into the Caspian Sea are the areas where sturgeon awaits the river to lay eggs. Fishermen in the spring and autumn fishing females, eggs, making caviar. In the twelfth century, Russian caviar has become famous. Soviet Union, Caspian Caspian produced 90% of the world’s caviar, the large number