cliff near sea beach

acid aquatic asia asian barnacles beach beaches biology brittany calcium cave caves cliff cliffs closeup coastal conch conchs countryside crustacea dense detail eco ecology ecotour erosion fossil fossils geo geography geological geology granite habitat habitats hard island japan limestone limpet lines macro microhabitat mollusc mud natural nature ocean oceans okinawa overgrown park pattern patterns pebble pressure rock rocks rocky rough saltwater sand seashell shell shells snail snails soil spiral stone stones summer texture tour tourism tourists travel water wind