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Zhou Liang displays a Yangtze sturgeon at a breeding base jointly operated by Yibin Institute of Rare Aquatic Animals and Fisheries Institute of Sichuan Academy of Agricultural Sciences in Yibin, southwest China's Sichuan Province, June 27, 2023. Zhou Liang is the director of Yibin Institute of Rare Aquatic Animals. He started to study with his father the subject of artificial breeding of rare fish since 1993. Since the successful artificial propagation of parent fish of Yangtze sturgeon bred in the institute in 1998, the whole artificial propagation of the rare fish and the production of three generations of fry have been realized one after another. Yangtze sturgeon, also known as Dabry's sturgeon, has lost its natural ability to reproduce since 2000 due to overfishing and water pollution, among other factors. The International Union for Conservation of Nature declared the species extinct in the wild in July last year. In March this year, a field breeding experiment is conducted in an inner river course of a section of the Yangtze River in Yibin. During the experiment, 10 male and 10 female mature parent fish of Yangtze sturgeon are released and eventually 8 female fish spawned more than 500,000 roes. "Since 2007, Get premium, high resolution news photos at getty