: any of a class (Holothurioidea) of echinoderms having a tough muscular elongate body with tentacles surrounding the mouth
called alsoholothurian
Illustration of sea cucumber
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Discoveries like bloody frogs and raw sea cucumbers raise concerns about possible disease transmission, invasive species and violations of international trade and wildlife protection laws.—Anna Commander, MSNBC Newsweek, 26 July 2025 Despite concerns about the limited availability of sea cucumbers, the compound is expected to become a crucial blueprint for future cancer research.—Jack Knudson, Discover Magazine, 10 June 2025 Few animals seem less animal-like than sea cucumbers.—Katarina Zimmer, JSTOR Daily, 15 May 2025 Nodules provide a habitat to species including sponges, soft corals and sea anemones and the muddy abyssal plains are home to sea cucumbers, starfish, anemones, crustaceans, worms and sponges.—Laura Paddison, CNN Money, 8 May 2025 See All Example Sentences for sea cucumber
: any of a class of invertebrate sea animals that are echinoderms with a long tough flexible muscular body resembling a cucumber and having tentacles surrounding the mouth at one end
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