Group 1 - The local government in Zhancheng District, Foshan City, has implemented a biological mosquito control method by releasing thousands of fish, specifically 4,200 fish fry including 4,000 silver carp and 200 Lali Maozu bass, into local parks to combat the spread of the Chikungunya virus [2] - The initiative aims to reduce mosquito breeding density by utilizing fish that feed on mosquito eggs and larvae, thereby interrupting the transmission chain of mosquito-borne diseases [2][4] - The fish species released are local varieties, and the Lali Maozu bass is a common ornamental fish, which minimizes ecological impact compared to invasive species like the "mosquito fish" [4] Group 2 - The "mosquito fish," originally from Mexico and the United States, is known for its aggressive nature and high reproductive rate, posing a significant threat to local ecosystems and is classified among the top 100 invasive species globally [4] - The local authorities will continue to monitor and evaluate the ecological impact and effectiveness of the fish released in controlling mosquito populations [4]