The video below is a time lapse in which a giant crab changes shells: as you can see, the crustacean jumps out from what was his old armor! A truly spectacular event! Actually, this unique process takes several hours, and in fact this video is a quick summary. You can compare undoubtedly to skin shedding of reptiles, but it should be noticed that in this case, the process is much more complicated, because as you well know the crab has several claws, which slow down the operation. The crustacean's exoskeleton is freed, and the main objective is to increase its size! Spectacular, don't you think?