guppy: see killifish killifish, northern representative, especially the genus Fundulus, of the Cyprinodontidae or toothed minnows, a family that includes also the topminnows and many popular aquarium fishes (e.g.
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Colourful, freshwater, live-bearing topminnows (Lebistes reticulatus and Poecilia reticulata; see killifish) popular as pets in home aquariums. Guppies are hardy, energetic, easily kept, and prolific. The male, smaller and much more brightly coloured than the female, grows to about 1.5 in. (4 cm). Guppies have been bred in various ornate strains characterized by colour or pattern and by shape and size of the tail and dorsal fins.
guppy
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guppy
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(Top) Male and (bottom) female guppies (Lebistes reticulatus)
(credit: Jane Burton—Bruce Coleman Ltd.)
guppy
a small brightly coloured freshwater viviparous cyprinodont fish, Lebistes reticulatus, of N South America and the Caribbean: a popular aquarium fish
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