ALEXANDER SEMENOV / SCIENCE PHOTO LIBRARY ALEXANDER SEMENOV / SCIENCE PHOTO LIBRARY
Trumpet worm. Upper side of the marine annelid worm Pectinaria koreni, a type of fanworm. Fanworms live in tubes built out of sand and other bits of debris found on the sea floor. They have parapodia (un jointed limb-like outgrowths) for movement, and gills for respiration (feathery, left).
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