The Nautilus are primitive members of the Cephalopod Class. He is characterised by his logarithmic spiral shell and mass of tentacles (up to 90). If threatened, he is able to withdraw entirely into his shell, covering it with a hood. Although his tentacles lack the adhesive pads of his relatives, they are ridged to allow him a firm grip on any prey that might come within grasp. He uses these and his powerful bill to rip crustaceans from the rocks to which they might attach themselves.
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