ANGEL FITOR / SCIENCE PHOTO LIBRARY ANGEL FITOR / SCIENCE PHOTO LIBRARY
Tube anemone. Close-up of a tentacle of a Cerianthus sp. tube anemone. Tube-dwelling anemones, or cerianthids, look very similar to sea anemones, but belong to an entirely different subclass of anthozoans. They are solitary, living buried in soft sediments. Photographed in the Mediterranean Sea, Alicante, Spain.
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