Tube anemone (Cerianthus membranaceus) on the seabed in a harbour. 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.
Model release not required. Property release not available.