ALEXANDER SEMENOV / SCIENCE PHOTO LIBRARY ALEXANDER SEMENOV / SCIENCE PHOTO LIBRARY
Bristle worm. Polychaete marine worm (Brada villosa) with its tentacles (lower right) almost completely retracted. This worm is a surface deposit feeder. It catches falling particles with numerous tentacles that it spreads out on the sea floor. These tentacles are often the only visible part of the animal with the remainder of its body being buried in the ground.
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