mosquitofish

from WordNet (r) 3.0 (2006)

mosquitofish
    n 1: silvery topminnow with rows of black spots of tropical
         North America and West Indies; important in mosquito
         control [syn: {mosquitofish}, {Gambusia affinis}]

from The Collaborative International Dictionary of English v.0.48

mosquitofish \mosquitofish\ n.
   A silvery topminnow ({Gambusia affinis}) with rows of black
   spots of tropical North America and West Indies; important in
   mosquito control.

   Syn: {Gambusia affinis}.
        [WordNet 1.5]

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