Sand, Outdoors, Nature, Sea Life, Animal, Invertebrate, Soil, Clam, Seashell, background, nature, sand, seaweed, shells, sea urchin skeleton, sea world, wildlife, without people, coast, coastline, beach, life, shell, microorganism, soil, protoctist, shore, weaponry, seashore, ammunition, earth, alga, outline
Skeleton of a sea urchin on the background of sand and algae