Chambered Nautilus Shell

chambered nautilus shell or Emperor nautilus shell, Nautilus pompilius, or the largest nautilus species, giant nautilus shell, Nautilus repertus. The living animal occupies the outer shell chamber. A tissue-lined tube of shell, the siphuncle, connects the body to older chambers. Gas in the sealed chambers balances the animal's growth, providing neutral buoyancy.

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marine invertebrate Mollusca mollusc mollusk Cephalopoda cephalopod Nautiloidea Nautilida Nautilidae Nautilus pompilius Nautilus pompilius chambered nautilus Emperor nautilus Nautilus belauensis belauensis Palau nautilus nature wildlife animal deep sea marine wildlife marine life photo photograph picture image Nautilus repertus repertus giant nautilus

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Nautilus