Unlike us, echinoderms like sea urchins have what is known as radial symmetry – meaning they’re symmetrical around a center point, like a pie. These purple and red sea urchins were observed in Greater Farallones National Marine Sanctuary off the coast of California.
the last of the bunch! click photos for names of rocks. ones worth mentioning are the regular stone in the last photo with the white lines, thats a lucky ring stone i found on a shore in cape cod, and its another one i carry around with me occasionally.