SCUBAZOO / SCIENCE PHOTO LIBRARY SCUBAZOO / SCIENCE PHOTO LIBRARY
A bright orange christmas tree worm (Spirobranchus giganteus), close-up. Christmas tree worms live in tubes in hard coral. They get their name from their spiral tentacles. The tentacles, which are used for feeding and respiration, protrude from the tube, but are retracted when disturbed. Photographed in Island Bay, Halmahera, Maluku Islands, Indonesia.
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