peanut worm

Noun
  1. Small unsegmented marine worm that when disturbed retracts its anterior portion into the body giving the appearance of a peanut (synset 102318473)
    is a type of: invertebrate - any animal lacking a backbone or notochord; the term is not used as a scientific classification
    belongs to: phylum sipuncula, sipuncula - peanut worms
    same as: sipunculid

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