killifish
noun
kil·li·fish
ˈki-li-ˌfish 
1
: any of a family (Cyprinodontidae) of numerous small oviparous fishes much used as bait and in mosquito control
2
: any of various live-bearers (family Poeciliidae)
Examples of killifish in a Sentence
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So far, Hector’s killifish has been found at over a dozen sites in Chiapas, a state of southern Mexico bordering Guatemala and the Pacific Ocean.
—
Aspen Pflughoeft, Miami Herald, 8 Aug. 2025
Most species are holding fewer cards than the killifish.
—Brian Owens, Smithsonian Magazine, 26 Jan. 2024
Meanwhile, banded killifish, mumichog’s close cousins, live mostly in freshwater in the eastern United States — and are among the few vertebrate species known to be able to reproduce asexually.
—Gabe Allen, Discover Magazine, 19 Jan. 2023
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Aspen Pflughoeft, Miami Herald, 8 Aug. 2025
Most species are holding fewer cards than the killifish.
—Brian Owens, Smithsonian Magazine, 26 Jan. 2024
Meanwhile, banded killifish, mumichog’s close cousins, live mostly in freshwater in the eastern United States — and are among the few vertebrate species known to be able to reproduce asexually.
—Gabe Allen, Discover Magazine, 19 Jan. 2023
See All Example Sentences for killifish
Cite this Entry
“Killifish.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/killifish. Accessed 14 Sep. 2025.
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