I have talked about and photographed, the Sea Potato sea urchins – Echinocardium cordatum Pennant – that live on the shores of the Gower Peninsula in earlier postings. This is the first time I have been able to capture one in a short video clip, very much alive and actively moving its spines, with two of the small pink bivalved molluscs (Tellimya ferruginosa Montagu) that live commensally in the burrow of the urchin still in position among the spines at the rear end of the animal near the anus.
For more information about the Sea Potato and other urchins click the links below to earlier postings on Jessica’s Nature Blog:
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