UCL, GRANT MUSEUM OF ZOOLOGY / SCIENCE PHOTO LIBRARY UCL, GRANT MUSEUM OF ZOOLOGY / SCIENCE PHOTO LIBRARY
Chambered Nautilus. Preserved specimen of the chambered nautilus (Nautilus pompilius). The nautilus is a marine cephalopod mollusc related to the octopus and squid. It has a spiral shell divided into many chambers, of which the animal inhabits only the outermost. The rest are filled with gas and fluid.
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