Ключевые слова: aquatic, arms, background, basking, beach, beautiful, beauty, biology, blue, cluster, coastal, coastline, colorful, contrast, creatures, echinoderm, ecosystem, environment, five, group, habitat, holiday, life, marine, motionless, nature, ocean, oceanic, relax, relaxation, reserve, sand, sandy, sea, seafloor, seashell, seashore, seaside, shallow, shore, star, starfish, summer, sun, top, travel, tropical, vacation, water, wildlife,