Holding on with suckers, it cracks the shell with its beak and injects poison. It usually returns home to eat the meal. An octopus explores with its tentacles and suckers. The suckers can taste the difference between sweet, sour and bitter, and can feel if something's rough or smooth. To grab a crab, an octopus draws up the centers of its suckers to create a vacuum.
Octopuses have tremendous gripping power.
It takes 18kg of pull to release the grip of a 1.4kg octopus.