GEORGETTE DOUWMA / SCIENCE PHOTO LIBRARY GEORGETTE DOUWMA / SCIENCE PHOTO LIBRARY
Fanworms (Sabellastarte sp.) on a reef. Close-up of a colony of polychaete fanworms, showing their tentacled heads. Fanworms are sessile predatory marine worms that use their tentacled heads to catch passing prey. Photographed in the Lembeh Strait, North Sulawesi, Indonesia.
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