patella vulgata or common limpets

patella vulgata common limpet sea snail marine gastropod mollusc patellidae wave action conical tensile strength teeth edible llampares lapa nossa senhora beach zambujeira mar portugal odemira travel alentejo clear fine sands nature park southwest parque natural sudoeste alentejano coast summer season sandstone layers spot rocky wild eroded landscape turquoise waters relaxing quiet tranquil coastal plots scenic geology rough geological shoreline retreat limpets attached rock