California is known for its rocky coastlines, which are famous for hosting diverse tide pools teeming with marine life.

California has some of the most notable rocky coastlines in the U.S., particularly along its Pacific coast. These rocky areas are home to tide pools, where marine life such as starfish, crabs, sea anemones, and algae thrive. The Maine coast also has rocky shores, but California's tide pools are particularly renowned for their biodiversity due to the nutrient-rich waters of the Pacific. Hawaii has volcanic rock coastlines, and Texas has sandy shores rather than the rocky coastline typical of tide pool environments.