The tide

We have visited Puerto Madryn many times and we had never seen so much life at the shores: live shells, crabs, baby fish, all kinds of sea bugs. This crab in the picture is about a hand size and there were others that looked like sea spiders with looooooong legs and smaller bodies (couldn´t take a pic of those, they just blended in the sand)

This  other set of pics are a first try at an experiment. How the tides change. I chose a spot,

 marked it with stones and took a picture every two hours. The original photographs have a trash can (waste bin or whichever other combination of words you like :D ) at the same spot of my screen to use as reference but Flickr had other plans.