Giant Coconut Crab: Coconut crabs have a body length of about 16 inches, a leg span of 3 feet, and can weigh up to 9 pounds. Though there are accounts of them reaching upwards of 6 feet across and weighing up to 30 pounds. They can also live more than 30 years. Coconut Crabs can't swim, even smaller crabs drown in water, though they require water to survive.
Red Crab Migration, Christmas Island | Australia At the beginning of the wet season, most adult red crabs suddenly begin a spectacular migration from the forest to the coast to breed. During peak migration times, sections of roads where crabs cross in high numbers may be closed to vehicles for short periods of time. (Photos by Alain Thain, Charlie Summers, and Max Orxard)