The Octopus is a marine creature well known on account of its distinct appearance comprising of a large head and 8 radiating arms with suckers found along their length; the Octopus belongs to the class Cephalopoda comprising of creatures like the squid, cuttlefish and nautilus whose exoskeleton is in the form of a shell.
The Octopus belongs to the order Octopoda and is further classified in to two sub orders Incirrata and Cirrata; the species belonging to the order Incirrata are unusual in the sense that they do not have an internal skeleton; their outer body too is soft in nature without covered by shell or any external growth. Their bodily structure helps the octopus to squeeze through tight spots while fleeing from predators; the only solid and bony part in their body is the beak which resembles a parrot's.
Octopuses belonging to the order Cirrata however have been observed to be distinct from those belonging to the order Incirrata with the chief distinguishing features being an internal shell like structure, positioning of a pair of fins on the head and the presence of strand like growth around the suckers.
The Octopus belongs to the order Octopoda and is further classified in to two sub orders Incirrata and Cirrata; the species belonging to the order Incirrata are unusual in the sense that they do not have an internal skeleton; their outer body too is soft in nature without covered by shell or any external growth. Their bodily structure helps the octopus to squeeze through tight spots while fleeing from predators; the only solid and bony part in their body is the beak which resembles a parrot's.
Octopuses belonging to the order Cirrata however have been observed to be distinct from those belonging to the order Incirrata with the chief distinguishing features being an internal shell like structure, positioning of a pair of fins on the head and the presence of strand like growth around the suckers.
