The fish *Elopichthys bambusa* (Richardson), commonly known as the scorpionfish or horizontal fish, belongs to the family Acipenseridae and the subfamily Yalominosae. It is a fast-swimming, agile predator that inhabits the middle and upper layers of rivers and lakes. Known for its fierce nature, it primarily feeds on other fish and is considered a large freshwater economic species. The fish grows quickly, reaches large sizes, and is prized for its delicious meat. Especially the dried version of the fish has been highly favored by people for its rich flavor.
However, due to the construction of water conservancy projects and environmental degradation, the natural population of this fish has drastically declined. In Zhejiang Province, it has become extremely rare to find these fish in rivers and lakes. To protect and develop this valuable species, the Zhejiang Science and Technology Department launched a provincial key project in 2002 titled "Fish Breeding and Healthy Breeding Technology and Demonstration of Freshwater Famous Fishes." This initiative was assigned to the Zhejiang Provincial Institute of Freshwater Fisheries, with artificial propagation and seedling cultivation as one of the core research areas.
In collaboration with the Jinshan Fish Breeding Farm in Donglin Town, Huzhou City, the institute successfully introduced 2.5Kg–8Kg adult fish from the Yangtze River as broodstock. These fish were intensively farmed for over two years until their gonads matured. On May 15, 2005, an artificial oxytocin test was conducted in Huzhou. Through techniques such as oxytocin injection and flowing water stimulation, the team achieved complete success in artificial reproduction. An expert panel from the Zhejiang Provincial Science and Technology Department conducted an on-site inspection on May 20, confirming a 100% codling rate, 83.3% fertilization rate, and 80% hatching rate. A total of 1.6 million fry were produced during this process.
This breakthrough marked the first successful artificial breeding of *Elopichthys bambusa* in China, representing a significant milestone in freshwater aquaculture and conservation efforts. It not only helps restore the fish population but also opens new possibilities for sustainable fish farming in the region.
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