: 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
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The discovery of the giant cuttlefish alone seems like enough of an accomplishment on which to build an oceanographic career.—Rob Crossan, JSTOR Daily, 21 Mar. 2025 Sometimes, the cuttlefish were seen switching between displays during the same hunt.—Sara Hashemi, Smithsonian Magazine, 5 Mar. 2025 Now, researchers have captured four specific cuttlefish camouflage techniques on video, revealing more about this mesmerizing ability.—Sara Hashemi, Smithsonian Magazine, 5 Mar. 2025 Specifically, cuttlefish readily adapted their skin patterns to match different backgrounds, whether natural or artificial.—Jennifer Ouellette, Ars Technica, 20 Feb. 2025 See All Example Sentences for cuttlefish
: 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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