Most of the smallest stay in the water, only coming out at low tide. They roll in the mud where they congregate and mate, searching for bugs and tiny crustaceans.
體型最小的一種大都待在水裡，只有退潮時才出來，它們成群結隊在水邊的泥濘中扭動身子，覓食泥中的小蟲和小甲殼動物。