Shapes of nature. A South African Turban Shell. It has a natural spiral pattern. These hermit crab shells have round openings with mother of pearl inside. Hermit crabs look great wearing an African turban. These shapes are called logarithmic spirals

Stock photo: Shapes of nature. A South African Turban Shell. It has a natural spiral pattern. These hermit crab shells have round openings with mother of pearl inside. Hermit crabs look great wearing an African turban. These shapes are called logarithmic spirals was taken by simmons48 .