water flea


Definition of water flea

: any of various small active dark or brightly colored aquatic crustaceans (such as a daphnia or cyclops)

Examples of water flea in a Sentence

Recent Examples on the Web The next year, in 1982, overseas ships were blamed for bringing into the lakes the spiny water flea that has ravaged native zooplankton and the little fish that depend upon them. Dan Egan, jsonline.com, 2 Sep. 2021 Andrei Savitsky's video of a water flea giving birth to cubs won third place in the competition. Elizabeth Gamillo, Smithsonian Magazine, 23 Aug. 2021 Euplotes skitters nimbly along surfaces atop cirri like some sort of Close Encounters–class water flea. Jennifer Frazer, Scientific American, 22 May 2021 The spiny water flea was first identified in North American in 1984 in Lake Huron. Popular Science, 17 Feb. 2021 Their numbers have been decimated by a fierce invasive predator, the spiny water flea. Tim Folger, Environment, 2 Dec. 2020 Other invaders arrived by the same route as the spiny water flea, in the ballast tanks of oceangoing freighters. Tim Folger, Environment, 2 Dec. 2020 Bythotrephes, a water flea with a long, spiny tail, eats other zooplankton and competes with fish for food. Jason Treat, Magazine, 17 Nov. 2020 The researchers also tested water that had been brewed with the plastic tea bags on water fleas. Aimee Picchi, CBS News, 27 Sep. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'water flea.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of water flea

1687, in the meaning defined above

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Time Traveler for water flea

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The first known use of water flea was in 1687

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Dictionary Entries Near water flea

water flaxseed

water flea


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Last Updated

15 Sep 2021

Cite this Entry

“Water flea.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/water%20flea. Accessed 21 Oct. 2021.

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More Definitions for water flea

water flea


Kids Definition of water flea

: a tiny often brightly colored freshwater animal related to the crab and lobster

More from Merriam-Webster on water flea

Britannica.com: Encyclopedia article about water flea


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