Worms of the Great Barrier Reef
2013-4-9u2002·u2002The classic Christmas tree or fanworm, is a great example. These polychaetes create a tube made of limestone or grainy particles that increase in length as the worm grow. The 2 fans that they extend into the water column are mucus lined and multi-purposed, in that they collect fine particles to feed on, and also extract oxygen from the water.
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