Meet the largest terrestrial arthropod, the coconut crab.
They can live up to 60 years old, and grow to sizes of a new born human child!
At up to 1 m (3 ft) long, coconut crabs are not simply the largest land crabs. They are the largest arthropods, the group that includes insects, spiders and crustaceans, that live on land. The Japanese spider crab is a larger animal, but living underwater it has the advantage of having its weight supported.
Despite their size, little is known about the state of their populations. As a result they are classed as Data Deficient by the International Union for Conservation of Nature, meaning we do not know enough to say whether or not they are threatened.
They live on small islands in the tropical Indian and Pacific oceans. Despite their name they eat a varied diet, including lots of fleshy fruit, and they also prey on smaller crabs.
Once a tasty coconut has been chosen they rip off strips of the husk with their pincers and then hit the shell repeatedly until it breaks open.
They live in underground burrows that are lined with husks of coconuts, unlike most crabs they are an entirely land based animal bar the ruturn to the ocean to lay their eggs, Coconut crab populations have never been properly surveyed, so we do not know how many there are or if they are in danger.