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Photo Essay
Under Antarctic Ice
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 ©2003 Norbert Wu/www.norbertwu.com

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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