The Sussex County Office of Mosquito Control uses a bio-control program as part of its integrated mosquito management approach. This involves the introduction of fish to control mosquito larvae in certain habitats. The fish used in this program are mostly Gambusia affinis, commonly known as mosquitofish. They are stocked in areas that 1.) are known to produce mosquitoes 2.) do not have an effective predator population and 3.) will not allow the introduced Gambusia to escape into natural waterways. These areas may include some types of stormwater management facilities, abandoned swimming pools, or wastewater treatment plants/lagoons.