The octopus typically has eight legs, which is why the octopus' alias is Octopus.

Octopuses are characterized by eight tentacles, sarcomas, and pigmented cells all over the body, with a maximum torso length of 220 millimeters for adult octopuses. The tentacles are about three times longer than the body (the so-called "head"). The body is cystic, and the boundary between the head and the body is not clear. The head has large compound eyes and eight retractable wrists. Each wrist has two rows of succulent suction cups that can effectively hold other things.

Features of an octopus's legs:

The octopus's wrists and feet are strong, and when a particular wrists and feet meet an emergency situation, the wrists and feet will break off as if cut by a knife. The fallen carpal foot will keep wriggling, and some will even suck on an object with suction cups so much so that it comes to confuse the enemy.

Octopus amputation is usually in the whole carpal foot four-fifths of the fourth, its carpal foot broken, blood vessels completely constricted and closed on their own. Self-amputation 6 hours later, blood vessels began to flow, blood gradually flow through the injured tissue, solid clot will not yet healed carpal foot wound cover, generally come to the next day the wound is healed, but also will grow new tentacles. I have to say that this vitality is really strong.