Tide Pools: Life at the Edge of the Sea (Nature Watch (Lerner))

At the edge of the ocean, a starfish suns itself on a rock. A clam is buried in the damp sand. A sea urchin's prickly spines poke out from a shallow pool of water. As waves crash on the shore, the water creeps higher and higher. Soon the rocks and shallow pools are completely under water--the tide has come in. Several hours later, the water is lower again. Throughout the day on coastlines around the world, the tides come in and go out, covering and exposing countless ocean creatures. Explore life at the edge of the sea in this edition of Nature Watch.