chaetognaths

chaetognaths
n.; n. pl. [Gr. chaite, hair; gnathos, jaw]
A phylum of free-living planktonic or benthic animals, commonly called arrowworms, having an elongated more or less translucent body with large grasping spines at the head and a posterior horizontal tail fin.

Online Dictionary of Invertebrate Zoology. . 2005.

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