arrowworm

== English == === Etymology === From arrow +‎ worm. === Noun === arrowworm (plural arrowworms) (zoology) A transparent predatory marine worm of the phylum Chaetognatha, found in plankton. === References === arrowworm on Wikipedia.Wikipedia Chaetognatha on Wikispecies.Wikispecies Category:Chaetognatha on Wikimedia Commons.Wikimedia Commons