The sea urchin, a spiny sea creature related to the starfish, is found in oceans all over the world. Its body wall is a firm, globose shell, made of fused skeletal plates. Five rows of the skeletal plates are pierced by pores for its tube feet, which it uses, along with its spines, for locomotion. Sea urchin “roe,” which is actually made from the organs that produce the roe, is considered a delicacy in Mediterranean regions and Japan, where it has been sold for what price? Discuss