NAUTILUS

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• It is a pelagic marine mollusc of the cephalopod family Nautilidae

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• Nautiluses are threatened by many other creatures
• Triggerfish with powerful teeth crack the nautilus' shell
• Other cephalopods attack them by drilling in their shells and poisoning the them with venom

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• Their tentacles are long, soft, flexible cirrus and retract into a hardened sheath.
• Nautiluses have more tentacles than other cephalopods (about 90)
• Their tentacles differ from other cephalopods for they lack pads
• The tentacles stick to prey by virtue of their ridged surface

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• Nautiluses have a bony body structure externalized as a shell
• The nautilus can withdraw into its shell and use a leathery hood to close the opening
• The leathery hood is formed from two specially folded tentacles

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https://www.youtube.com/watch?v=PIheRYcm6sI