noun
- A small, transparent marine worm of the phylum Chaetognatha, typically found in plankton and characterized by bristle-like appendages around the mouth.
Usage: scientific/technical term; also called arrow worm
Examples
- Chaetognaths are abundant members of marine zooplankton communities.
- The chaetognath uses its bristles to capture small prey.
- Scientists study chaetognaths to understand ocean food webs.
- Chaetognaths are found in oceans at various depths worldwide.