Pan from lichen filled rock formation to rocks strewn in the path of the low tide water, Puerto Peñasco, Gulf of California, Mexico

intertidal beach bahia la choyas tidal pools rocky shore tide pools littoral zone low tide rocky point foreshore cholla bay marine biomes coastal feature rocks rock flats shoreline mud flats pacific ocean rock formation gulf of california puerto penasco sand flats nature reserve eroded beach ocean laguna del mar nature extreme terrain ecology sand ridges extreme ecosystem flowing water crevices environmental conservation lichen sand habitat pan mexico biodiversity holes fluctuation changes drastic change drastic cracks