Coconut crab - Birgus latro

The coconut crab (Birgus latro) is a type of land hermit crab with a spectacular appearance and intriguing biology. Able to grow to relatively gigantic proportions, the coconut crab is probably the largest terrestrial arthropod in the world. Indeed, Charles Darwin described the coconut crab as "monstruous" when he encountered it on the Keeling Islands during the voyage of the Beagle