Giant Pacific octopuses are cephalopods meaning that their arms are connected directly to their heads. They are the largest and longest living of all octopus species. They can learn to solve mazes, open jars, recognize people’s faces and even escape enclosures and are the only invertebrates known to exhibit play behavior. Also, they can camouflage themselves to match their environment. Climate change is negatively affecting them through warming temperatures that disrupt egg development, acidification that harms prey and hypoxic zones that decrease available habitat.