A half-sized coconut crab climbing a tree. The coconut crab is the largest land-based arthropod in the world, when fully grown they can weigh up to 4.1kg (9.0 lb) with a leg span more than 0.91m (3.0 ft). Credit: pohnpei_surf_club/IG

A half-sized coconut crab climbing a tree. The coconut crab is the largest land-based arthropod in the world, when fully grown they can weigh up to 4.1kg (9.0 lb) with a leg span more than 0.91m (3.0 ft). Credit: pohnpei_surf_club/IG