Collection of shells: Rayed trough shell (Mactra stultorum cinerea / Mactra corallina cinerea), Common oyster (Ostrea edulis), Scallop shell (Pecten jacobeus), Smooth cockle / Norway cockle (Laevicardium crassum), Baltic tellin shell (Macoma balthica), Common mussel (Mytilus edulis), Dog cockle (Glycymeris glycymeris), Common piddock (Pholas dactylus), American piddock (Petricola pholadiformis), Poorly ribbed cockle (Acanthocardia paucicostata), Common cockles (Cerastoderma edule / Cardium edule), Atlantic jackknife / American jackknife clam / razor clam (Ensis directus / Ensis americanus), Variegated scallop (Chlamys varia / Mimachlamys varia), Pullet carpet shell (Venerupis senegalensis), White piddock (Barnea candida), Rayed artemis (Dosinia exoleta), Banded wedge shell (Donax vittatus), Common limpet (Patella vulgata) and American slipper limpet (Crepidula fornicata) from the North Sea