DR KEITH WHEELER / SCIENCE PHOTO LIBRARY DR KEITH WHEELER / SCIENCE PHOTO LIBRARY
Common starfish (Asterias rubens) on rocks at low tide. Starfish are echinoderms which usually have five arms. They move by means of numerous short tubular feet, which end in suction discs. These are situated along the underside of the arms. Its mouth is under the centre of its body. The common starfish preys on other echinoderms, worms and molluscs. It is widespread in the north-east Atlantic and around the shores of the UK and Ireland.
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