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Related to Holothuroidea: Sea cucumbers
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|Noun||1.||Holothuroidea - class of echinoderms including the sea cucumbers|
Echinodermata, phylum Echinodermata - radially symmetrical marine invertebrates including e.g. starfish and sea urchins and sea cucumbers
holothurian, sea cucumber - echinoderm having a flexible sausage-shaped body, tentacles surrounding the mouth and tube feet; free-living mud feeders
class - (biology) a taxonomic group containing one or more orders