Ключевые слова: animal, background, beach, beautiful, benthos, blue, closeup, coast, collect, collector, deep, echinodermata, echinoid, exoskeleton, five, hole, hollow, horizontal, inner, inside, macro, marine, micro, mussel, nature, ocean, pattern, radial, sea, seafloor, skeleton, snail, strand, structure, symmetric, symmetry, through, urchin, water,