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This seastar
(Odontaster validus) is climbing up the stalk of a sabellid polychaete
(featherduster) worm (Potamilla antarctica). This worm uses its
tentacular crown as a food-gathering net for its suspension feeding. The
outspread feathery tentacles are covered with hairlike cilia that carry
small food particles down to the worm's central mouth.
--Norbert Wu
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