Sea shellsSeashellscome in different shapes ,sizes , and colors.Some shells grow as big as 4 feet long> Some shells are smaller than 12 inches long . Some shells have tow sides that open like wings .Other shells are shaped like a curling tube . Shells come in all colors : white , black , yellow , green , red orange , and pink . They are like a rainbow in the ocean. Many seashells are named for other things we know > The spider shell is one example > The spider shell has long points that look like spider legs . The comb shell has has points , too. Its points are straight and close together, just like those in a comb.