Ключевые слова: aquatic, brown, coast, compressed, depressed, discover, environment, explore, fauna, flattened mussel, flora, lake, living organism, mollusk, mollusks, mussel, nature, outdoor activities, outdoors, peaceful, pond, reservoir, river mollusc, river mussel, river valley, riverbank, rugae, sand, shallow, shells, shells on sand, shore, snail, summer, water, wilderness,