The island is a haven for several types of crustacean; "warrior crabs" (''Cardisoma carnifex'') overrun the jungle at night. The extremely large  coconut crab or robber crab (''Birgus latro'') is found here in large numbers. Because of the protections provided the species on this atoll, and the isolation of the east rim of the atoll, the species is recorded in greater densities there than anywhere else in its range (339 crabs/ha).