Port Phillip Bay, located in southern Victoria, Australia is now home to tens of thousands of Great Spider Crabs. These crustaceans congregate in order to protect themselves while they go through their seasonal molting process. After they’ve completed their molting, the crabs’ shells are soft, making them more vulnerable to prey. Hanging out in a giant group reduces their chance of being gobbled up by a hungry stingray.
Click next for a video of the Great Spider Crabs in action.