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Danube Basin, 21 May 2016. World Fish Migration Day (WFMD) is held on May 21 and will bring together more than 1,500 organizations, featuring more than 350 events worldwide.

Belene, 18 November 2014. WWF has released some 5,000 sterlets into the Danube River today as part of a 50,000-strong sturgeon restocking programme. This is the first restocking of endangered sturgeons performed by a non-government organization in Bulgaria, after years of scientific research, climatic and biological challenges.