Kids from the fishermen hamlets, armed with golden claws, were furiously digging out molluscs/shells; their food.
Yes, this red crab grabbed all my attention. They live in those vertical pits, and were busy digging out the sand. What strikes is their sensitivity to movements. A little movement and they disappear into their holes. Those white eye like things must be really sensitive.
And there were lots of these sand colored crabs. Notice the way they carry the sand up for dumping. Need to figure out details of these crabs; different species or male/female of the same species ?