The high tide zone is flooded for hours during each high tide. Organisms must survive wave action, currents, and exposure to the sun. The high tide zone is inhabited by sea anemones, starfish, chitons, crabs, green algae, and mussels. Marine algae can provide shelter for such organisms as nudibranchs and hermit crabs. The same waves and currents that make the life in the high tide zone difficult bring food to the filter feeders and other intertidal animals.