Any worm of the Chaetognatha,transparent marine worm with horizontal lateral and caudal fins and a row of movable curved spines at each side of the mouth.

 
  • 毛颚类动物的蠕虫,透明的海生蠕虫,侧部水平,有尾鳍,嘴巴每侧有可卷曲活动的一排棘刺。
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