gup·​py ˈgə-pē How to pronounce guppy (audio)
plural guppies
: a small bony fish (Poecilia reticulata of the family Poeciliidae) especially of Barbados, Trinidad, and Venezuela that is a live-bearer and is often kept as an aquarium fish

Illustration of guppy

Illustration of guppy
  • 1 female
  • 2 male

Examples of guppy in a Sentence

Recent Examples on the Web This behavior occurs across a range of animals, from guppies to gazelles. Athena Aktipis, Scientific American, 1 Nov. 2023 Tupac was a guppy that got swallowed up by some ferocious sharks. Vulture, 3 Oct. 2023 The hatchlings are currently enjoying a private habitat and eating guppies and minnows, Foster said. Isabella Volmert, Dallas News, 31 Aug. 2023 Each guppy is numbered one through four. Kathleen Willcox, Popular Mechanics, 26 May 2022 In the wild, females of P. reticulata (the Trinidadian guppy) swim in small groups called shoals. Elizabeth Preston, Discover Magazine, 7 Dec. 2011 Now, Hendry and colleagues have updated and expanded the original data set with more than 5,000 additional examples: everything from the cranial depth of the common chaffinch to the lifespan of the Trinidadian guppy. Amit Katwala, Wired, 4 Feb. 2022 Because of the bay’s world-class beauty as a tourist destination, some who don’t know a halibut from a guppy will often come aboard for the boat ride and a chance to catch a fish. Tom Stienstra, San Francisco Chronicle, 3 June 2021 The Jazz, inside of a few possessions, finishing up the third quarter straight ahead into and through the fourth, transformed from a guppy into a Great White. Gordon Monson, The Salt Lake Tribune, 23 Feb. 2021

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'guppy.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History


R. J. L. Guppy †1916 Trinidadian naturalist

First Known Use

1925, in the meaning defined above

Time Traveler
The first known use of guppy was in 1925

Dictionary Entries Near guppy

Cite this Entry

“Guppy.” Dictionary, Merriam-Webster, Accessed 23 Apr. 2024.

Kids Definition


gup·​py ˈgəp-ē How to pronounce guppy (audio)
plural guppies
: a small tropical minnow often kept in aquariums

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