There are holes in the sand. They are present where there is no coral. The sand patches are like little deserts. I never see any activity around the holes. I have been told that there is a sentinel fish that guards and looks out. And there is a shrimp below who makes the hole. Both fish work together. This particular weekend I was fortunate to catch everyone home together. Notice the little antennae of the shrimp. And the fish is looking up and to the left. The deceptive eye marking is on the tail and to your right. Yup, you don’t see this everyday.