what is octopus
An octopus (/ËÉktÉpÊs/ or /ËÉktÉpÉs/ ; plural: octopuses, octopi, or octopodes; see below) is a cephalopod mollusc of the order Octopoda.It has two eyes and four pairs of arms and, like other cephalopods, it is bilaterally symmetric. An octopus has a beak, with its mouth at the center point of the arms.ll octopuses are venomous, but only one group, the blue-ringed octopus, is known to be deadly to humans. Around 300 species are recognized, which is over one-third of the total number of known cephalopod species. The term 'octopus' may also be used to refer specifically to the genus Octopus.