arrow worm
A marine invertebrate of the phylum Chaetognatha; a technical zoological term.
See also: 毛顎動物
Arrow worms were found in the plankton sample.
Usually written in katakana; the kanji form 矢虫 is rare.
Kanji form; rarely used in practice.
The name ヤムシ (矢虫) literally means 'arrow insect/worm', referring to the arrow-like shape of these animals. The exact derivation is uncertain.