1. chaetognath (any worm of phylum Chaetognatha)See also 矢虫
Wikipedia definition
2. ChaetognathaChaetognatha, meaning hair-jaws, and commonly known as arrow worms, are a phylum of predatory marine worms that are a major component of plankton worldwide. About 20% of the known species are benthic, and can attach to algae and rocks. They are found in all marine waters, from surface tropical waters and shallow tide pools to the deep sea and polar regions. Most chaetognaths are transparent and are torpedo shaped, but some deep-sea species are orange.
Read “Chaetognatha” on English Wikipedia
Read “毛顎動物” on Japanese Wikipedia
Read “Chaetognatha” on DBpedia


to talk about this word.