mosquitofish
/məˈskiːtoʊˌfɪʃ/
noun
- A small freshwater fish that eats mosquito larvae, often used to control mosquito populations.
- Mosquitofish are popular in backyard water gardens because they help control pests naturally.
- The pond was stocked with mosquitofish to keep the mosquito population down.
- We added a few mosquitofish to the rain barrel to prevent mosquitoes from breeding.