pebbles underwater with algae on the seabed.

abstract algae backdrop background backgrounds beach bottom clean clear closeup coast coastline color corfu day glyfa glyfada granite gravel greece greek heap horizontal island lake light liquid many material mineral multi natural nature nobody objects ocean outdoor outdoors pattern pebble pebbles pond river rock rocks round sea seabed several shadow shape smooth stone stones structure sun surface texture textured tranquil transparent underwater variation view wallpaper water wave