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A protected specie

Sturgeon has been protected since 1998 by the Convention on International Trade in Endangered Species of Wild Fauna and Flora, known as CITES or the Washington Convention. It aims to preserve wild biodiversity by combating commercial over-exploitation of species. Today, CITES totally controls caviar trade with quotas.
The countries of the Caspian Sea (Iran, Russia, Kazakhstan, Turkmenistan, and Azerbaijan) have agreed to ban fishing of wild sturgeon in the Caspian Sea. This agreement, which has existed since 2008, is renewed every year, and implies that none of these countries can export caviar from wild fisheries.