Illustration of cuttlefish
cuttlefish
noun
cut·tle·fish
ˈkə-tᵊl-ˌfish 
: any of various marine cephalopod mollusks (order Sepiida, especially genus Sepia) having eight short arms and two usually longer tentacles and differing from the related squid in having a calcified internal shell
Examples of cuttlefish in a Sentence
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The experience spurred him to explore the subjective experience of cephalopods, the marine invertebrates (including octopuses, cuttlefish, and squid) whose sentience developed on an evolutionary lineage that split off from ours about six hundred million years ago.
—
The New Yorker, New Yorker, 28 May 2025
Now new research has suggested this intelligence extends to how cuttlefish communicate with each other.
—Rachael O'Connor, MSNBC Newsweek, 7 May 2025
Still, the signals do add to the evidence of how smart cuttlefish are.
—Chris Simms, Scientific American, 5 May 2025
And individual cuttlefish seem to choose different preferred hunting displays for different environments.
—Jennifer Ouellette, Ars Technica, 20 Feb. 2025
See All Example Sentences for cuttlefish
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The New Yorker, New Yorker, 28 May 2025
Now new research has suggested this intelligence extends to how cuttlefish communicate with each other.
—Rachael O'Connor, MSNBC Newsweek, 7 May 2025
Still, the signals do add to the evidence of how smart cuttlefish are.
—Chris Simms, Scientific American, 5 May 2025
And individual cuttlefish seem to choose different preferred hunting displays for different environments.
—Jennifer Ouellette, Ars Technica, 20 Feb. 2025
See All Example Sentences for cuttlefish
Cite this Entry
“Cuttlefish.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cuttlefish. Accessed 20 Jul. 2025.
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cuttlefish
noun
cut·tle·fish
-ˌfish
: a marine mollusk having eight short arms and two longer tentacles and differing from the related squid in having an internal shell composed of compounds of calcium
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