The Coconut Crab (Birgus latro), also known as the robber crab or palm thief, belongs to the family Coenobitidae within the order Decapoda. Despite their name, they are not true crabs but are more closely related to hermit crabs.
Coconut Crabs
Researchers at the Okinawa Churashima Foundation in Japan, found that a coconut crab’s pinching power corresponds with its size — and that force was tremendous.