Ключевые слова: 1, animal, bivalve, black, bright, calcareous, calcium, case, chitin, clam, close, coating, concave, conic, creamy, ebon, empty, exeskeleton, gastropod, glass, glossy, hard, hollow, isolated, ivory, layer, light, marine, mollusc, molluscan, mollusk, molusc, mussel, nacrous, object, ocean, ocher, one, outer, pearl, protective, sea, seashell, shell, shelter, single, snail, spiral, whelk, whole,