Topminnow
noun, plural (especially collectively) topminnow (especially referring to two or more kinds or species) topminnows.
1.
any of several small, surface-swimming fishes of the egg-laying family Cyprinodontidae and the live-bearing family Poeciliidae, some of which are used in mosquito control.
noun (pl) -now, -nows
1.
any of various small American freshwater cyprinodont fishes that are either viviparous (genera Heterandria, Gambusia, etc) or egg-laying (genus Fundulus)
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