ALEXANDER SEMENOV / SCIENCE PHOTO LIBRARY ALEXANDER SEMENOV / SCIENCE PHOTO LIBRARY
Feather duster worm. Close-up of tentacles surrounding the mouth of the polychaete (marine annelid) worm Branchiomma arctica. These worms live in tubes made out of sand, and bits of shell and other debris. They tend to be common in the intertidal zones around the world.
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