Giant Coconut Crab That is a giant crab on a garbage can. They’re native to Guam and other Pacific islands. Coconut crabs aren’t endangered, per se, but due to tropical habitat destruction they are at risk. In WWII, American soldiers stationed in the Pacific theater wrote home with tales about entire atolls being covered in the armor-plated giants. These crabs can crack a coconut in one swipe; but they’re generally too slow to be very dangerous to humans.