Sturgeons - Danube Delta - Romania

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Spectators enjoying the Russian sturgeon (Acipenser gueldenstaedtii) in an aquarium in Tulcea. Captive (Image shot in aquarium) in Danube Delta Eco Tourism Museum Center, Tulcea, Romania.<br />
Also known as the diamond sturgeon or Danube sturgeon. Russian sturgeon reproduce slowly, making them highly vulnerable to fishing. 2006 IUCN Red List of Threatened Species.