Cephalopoda: Octopus, Cuttlefish and Nautilus.
An octopus is a soft-bodied, eight-limbed mollusc of the order Octopoda. The order consists of some 300 species.

Cuttlefish or cuttles are marine molluscs of the order Sepiida.

A native of the tropical Pacific, the nautilus is an octopus' cousin. It has more than 90 tentacles — the most of any cephalopod — which it uses to feel and grope along the reefs for food. Unlike those of other cephalopods, a nautilus's tentacles have grooves and ridges instead of suckers.