I was in Velas to witness and Photograph the Velas turtle festival. During our 1st visits to beach I noticed these strange patterns on the beach. After a careful observation from a distance I could see the small crab coming out of borrow. Sand bubbler crabs live in burrows in the sand, where they remain during high tide. When the tide is out, they emerge on to the surface of the sand, and scour the sand for food, forming it into inflated pellets, which cover the sand. The crabs work radially from the entrance to their burrow, which they re-enter as the tide rises and disintegrates the pellets. The pattern created is looking like some piece modern art by a master artist.