Ключевые слова: background, beach, carbonate, chalk, chitons, christmas, clams, closeup, collecting shells, ecology, empty, exoskeleton, garlands, invertebrate, life form, mantle, mollusks, nature, new year, object, ocean, organism, ornament, sea, shell, shellfish, shellfish calcium, single, skeleton, spiral, table, the world of animals, tree, tropical, types of shell, valves,