55.
Antarctic octopus - Class Cephalopoda
- The cephalopods are a small group of highly advanced,
exclusively salt water molluscs, to which octopus, squid, cuttlefish, and chambered
nautilus belong. Extinct forms outnumber the living. The best-known cephalopod features
are the possession of arms and tentacles, eight (octopus) or ten (squid) in most forms,
and the use of ink for protection.
