It contains a toothed tongue for grasping. One or two rows of sensitive suckers are found on the bottom of the arm. In the neck part above the arms are the brain and the eyes. The octopus is really smart and can learn really fast. Octopi don't have any hearing organs but have really good eyesight and can see color like human eyes.
Octopuses live close to land and in deep water.
The Blue Ringed Octopus lives close to land and the Devil Tooths lives in deep water. The Octopus doesn't have a backbone so it can squeeze through small holes. With its long arms, it can crawl over rocks and other things. Its suckers allow it to stick onto things. Prey is captured in the arms, brought to the mouth, bitten by the hard beaklike mouth, and injected with poison from the salivary gland.