A small, translucent arrow worm swims above a sandy deep-sea floor.
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Arrow Worm
We saw several worms during Dive 06 of the 2026 American Samoa ROV + Mapping Exploration expedition, including bristle worms and scale worms observed swimming above the seafloor and this transparent Chaetognatha arrow worm seen floating about a meter above the seafloor.
Credit

NOAA Ocean Exploration, 2026 American Samoa ROV + Mapping Exploration