食蚊鱼是淡水鱼，以蚊子幼虫为食，高度的群体化。
Mosquitofish, freshwater fish with a taste for mosquito larvae, are highly social.
据报道，吃蚊子幼虫的鱼被放在了选手村来预防运动员登革热病，一只雌性蚊子会将病毒染给人类。
Fish that eat mosquito larvae have reportedly been put in the pond in the Games Village to protect athletes from dengue, a viral infection transmitted to humans by the female Aedes mosquito.
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