A genus of marine bristle worms (polychaetes) characterized by a body bearing numerous bristle-like setae.
From Greek 'chaete' (bristle) and 'soma' (body), literally meaning 'bristle-body' or 'a body characterized by bristles.'
Chaetosoma worms burrow in the seafloor and their countless bristles help them sense vibrations from approaching predators—they're basically living seismic sensors buried in the sand.
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