Mosquito Fish

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Related to mosquitofish: mosquito hawk, Gambusia affinis

Mosquito Fish


(Gambusia affinis holbrooki), a fish of the family Poecilidae, order of cyprodonts. In the male the front spines of the anal fin have become a copulatory organ, the gonopodium. Length of the male, up to 4 cm; weight, up to 0.4 gm. Length of the female, up to 7 cm; weight, up to 3.5 gm.

The mosquito fish is viviparous; there may be up to six broods annually at one month intervals. The number of young per brood ranges from 15 to over 100; their body length is 7-8 mm. Sexual maturity is reached at one month. The mosquito fish lives in small bodies of stagnant water and feeds on the larvae and nymphs of mosquitoes, small water animals, roe, and even its own offspring. Its natural habitat is North America.

The mosquito fish was introduced into the USSR in 1925 by the physician N. P. Rukhadze. After successful acclimatization, it was used extensively and with great success in the battle against malaria in the 1930’s and 1940’s in the Central Asian Republics, the southern RSFSR, and the Ukraine. The mosquito fish can cause damage in fishing grounds.


Sokolov, N. P. Gambuzii i ikh rol’ v bor’be s maliariei. Tashkent 1939.
Ivanov, I. K. Ryby-gambuzii i ikh rol’ v bor’be s maliariei vKazakhstan. Alma-Ata, 1950.


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Antipredator responses by native mosquitofish to non-native cichlids: An examination of the role of prey naivete.
Adult western mosquitofish were collected from Martell Forest Pond (Tippecanoe County, Indiana), while northern starhead topminnows were captured from Pine Lake and Upper Fish Lake (Laporte County, Indiana).
Reproductive biology of mosquitofish in a permanent lagoon in south-west Spain: two tactics for one species.
Ex situ evaluation of impacts of invasive mosquitofish on the imperiled Barrens topminnow.
Elevation of Glutathione-S-transferase and inhibition of cholinesterase activity as a biomarquers of fungicide toxicity in mosquitofish Gambusia affinis.
This spring was soon diverted for a fishing pool, however, where non-native green sunfish (Lepomis cyanellus) preyed on the minnow-like gambusia, and survivors faced insurmountable competition from the western mosquitofish (Gambusia affinis).
Working with Dr Bart Adriaenssens at the University of New South Wales, Dr Biro observed the behaviour of adult male mosquitofish over 132 days.
Western mosquitofish (Gambusia affinis) are stocked in Indiana waters for the biological control of mosquitoes.
Life history pattern and feeding habits of the invasive mosquitofish, Gambusia holbrooki, in Lake Pamvotis (NW Greece).
Brian Langerhans of North Carolina State University and his colleagues studied the Bahamas mosquitofish (Gambusia hubbsi) around Andros Island.
In this study, we examined the basic morphology of the anal fin of the mosquitofish using conventional histological techniques (H&E- and alcian blue/alizarin red-staining) and scanning electron microscopy.