1966 Compton Ave. Corona, CA 92881 - 951-340-9792

    The mosquito fish (Gambusia affinis) is an efficient predator of immature mosquitoes breeding in aquatic habitats such as ornamental ponds, water troughs, and bird baths. A mature female grows to length of about 2 inches while males are smaller (1.5 inches). Both males and females are dull grey to light olive green in color.


    Mosquito fish can survive in water temperatures ranging from 33 to 102 degrees Fahrenheit. These fish can tolerate high concentrations of chlorine but not chloramine (a chemical substitute for chlorine used to decontaminate water). Mosquito fish can survive the environmental conditions of Southern California winters in water deeper than 3 feet. Usually, in backyard sources they must be restocked annually. The female produces eggs that hatch within her body and only young or fry are delivered into the habitat. The gestation period of the female mosquito fish is approximately 24 days, and the fry will reach maturity in 4-6 weeks. On average each female will produce 3-4 broods of 50-100 fry over the course of a summer.


    The life span of a mosquito fish varies from 1-2 years under natural conditions. Egrets, herons, and bass are the three major predators of mosquito fish. Mosquito fish are reasonably compatible with goldfish, carp and other outdoor ornamental pond fish. The fish can be safely transported for short distances in clean containers or sturdy plastic bags.


    The stocking of mosquito fish for mosquito control is highly encouraged by the District, and fish are provided to residents who reside within the District boundaries free of charge.

Female Mosquito Fish approx. 2”

Male Mosquito Fish approx. 2”

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