Five CUs of fiddler crab gathering mud balls for burrow. CU of water pools on mud flats. Time-lapse of water rising on mud flats. MCU of water flowing over mud. CU of fiddler crab covered with bubbles moving through muddy water. MCU of shorebird standing on dry patch by mud flats, dipping beak in water, vocalizing. Three shots of fiddler crab finding empty hole under shallow water, diving under as bubbles rise. (407)