An octopus crawls into a hole in the sand and makes a strange noise. Octopuses use a subtle and effective survival strategy: they take refuge in holes dug in the sand. These shelters mainly allow them to escape from predators by perfectly camouflaging themselves, sometimes revealing only their eyes. Thanks to their ability to change color and texture, they become almost invisible at the bottom. These hideouts also serve as hunting stations. Hidden in their holes, octopuses wait for prey to pass by before suddenly jumping out to grab it. This ambush technique allows them to conserve energy, while remaining highly effective. End, these shelters also offer a safe place to rest or shelter from currents.