Octopus, also known as stone snail, octopus, octopus, stone-sucking, tide-watching, and dead cattle, belongs to the subclass Octopus such as mollusks. Octopus has eight wrist feet, and there are many suction cups on the wrist feet; Sometimes black ink is sprayed to help escape. Some octopuses have developed brains and can distinguish themselves in the mirror; You can also walk out of the maze designed by scientists and eat crabs in the maze.