Scientific name Mictyris longicarpus

Small crabs found on the sandy and muddy flats of estuaries. When tides ebb and the grounds appear, they emerge and walk in groups. Feeds on detritus and algae in the mud using the claws skillfully. Many sand dumplings are left after their meals. If you approach them, they turn round and round and go underground in a second. Although crabs, they can move forward.