Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun Any of various small fishes of the family Fundulidae of North America, Bermuda, and Cuba, found in fresh, brackish, and coastal marine waters.
  • noun Any of several similar fishes of the family Poeciliidae.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun Any of the ray-finned fish in the taxonomic family Fundulidae

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun freshwater fish of Central America having a long swordlike tail; popular aquarium fish
  • noun small usually brightly-colored viviparous surface-feeding fishes of fresh or brackish warm waters; often used in mosquito control

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[So called because the fish swim near the surface of the water.]

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