Octopi
An octopus is a cephalopod with eight arms, and technically has no tentacles, though they are commonly called tentacles. They have no internal structure, though some may have vestiges of shells. All octopi are venomous and can squirt ink. Octopi can squish into small spaces easily do to their lack of bones or shells. Most species have rounded heads. Octopi, along with other cephalopods, are some of the most intelligent creatures on the planet.
