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mosquitofish

[muh-skee-toh-fish]
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noun, plural (especially collectively) mos·qui·to·fish, (especially referring to two or more kinds or species) mos·qui·to·fish·es.
  1. any of several fishes that feed on mosquito larvae, as Gambusia affinis, found in the southeastern U.S., now introduced into other parts of the world for mosquito control.
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Also mosquito fish.

Origin of mosquitofish

First recorded in 1925–30; mosquito + fish
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018