Photo copyright Tim Nicholson.
Burrowing Anemone, Cerianthus lloydii Taken in Isle of Harris, Scotland.
This common species is not a true anemone but a tube anemone. Instead of attaching itself to a rock it lives in a soft felt-like tube protruding above sand or mud. The anemone's tentacles are usually all that is visible. The inner set circle the mouth and are short and stiff. The long, flexible and attractive outer ones, over 100 of them, sweep prey inwards. When disturbed the whole anemone shoots back into its tube, like a tubeworm. The tentacle crown measures up to 10 cm across.
The animals live from the shallows down to 100 m. The tentacles may be white, brown, green or banded.
The burrowing anemone is found around the British Isles and in North West Europe to the Bay of Biscay.
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Great British Marine Animals, by Paul Naylor, Deltor (2011)
The Underwater Photographer: Digital and Traditional Techniques, by Martin Edge, Paperback, 536 pages (2009)