Bristleworm (Scoloplos armiger) and Blue mussel (Mytilus edulis) on beach, BelgiumGreat piddock / Oval piddock (Zirfaea crispata), Pas de Calais, France Beadlet anemone (Actinia equina) in rockpool, Brittany, FranceBaltic tellin shells (Macoma balthica) on beach, BelgiumSea noodles (Nemalion helminthoides) and Sea lettuce (Ulva lactuca) exposed on beach at low tide, Brittany, FranceShark's teeth fossils, BelgiumBed of exposed Common / Blue mussels (Mytilus edulis) on rock at low tide, Brittany, FranceNetted dog whelk (Nassarius reticulatus / Hinia reticulata), Normandy, FranceGreen sea urchin (Psammechinus miliaris) on beach, Belgium