The chambered, or pearly, nautilus (Nautilus pompilius) is a charismatic cephalopod species known for its exceptional spiraling, chambered shell. It belongs to a family that has barely changed since ...

HABITAT: The chambered nautilus lives in deep fore reefs (at about 330 feet ... THREATS: Strong overharvesting to fuel the international shell trade, habitat degradation, and the inadequacy of ...

One such chambered shell is the nautilus shell, a common image in geometry used to symbolise the Fibonacci sequence, in which a number is the sum of the previous two (so 1, 1, 2, 3, 5, 8 and so ...