Living ‘Sea Potato’ sea urchin, Echinocardium cordatum (Pennant), showing upper surface, on the low tide sand at Port Eynon, Gower, South Wales, UK (8)
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Living ‘Sea Potato’ sea urchin, Echinocardium cordatum (Pennant), showing upper surface, on the low tide sand at Port Eynon, Gower, South Wales, UK (8)