Scopimera globosa

Also known as Sand-Bubbler Crab, Globe Sand Bubbler Crab

Sand bubbler crabs emerge on exposed intertidal sandflats at low tide, sifting through moist sediment for microscopic food. As they process the sand with specialized mouthparts, they scrape the clean residue into neat, round pellets that radiate outward from their burrow entrances. Before the returning tide flattens their intricate sand patterns, these miniature crustaceans retreat underground, trapping air inside their burrows to survive submerged.