Chambered Nautilus
Nautilus pompilus
Video
Click Here to See a Chambered Nautilus Eating a Crab ...
Chambered Nautilus
Nautilus pompilius
Habitat
The chambered nautilus lives in tropical waters extending from the Andaman Sea east to Fiji and from southern Japan to the Great Barrier Reef.
To keep itself afloat and upright, the chambered nautilus has a tube called a siphuncle that runs down the center of each chamber and releases a gas, maintaining a density close to that of sea water.
A: A chambered nautilus is a mollusc in the class cephalopoda, and is related to octopus and squid. It is the only living cephalopod with a shell, although there are several fossil forms known.
chambered nautilus (Nautilus nautilus)
chocolate chip sea star (Protoreastor nodosus)
christmas tree worm (Spirobranchus giganteus)
cleaner shrimp (Lysmata amboinesis)
closed brain coral (Favites sp.)
common urchin (Echinometra mathaei) ...
Octopuses, squids, cuttlefish and the chambered nautilus belong to class Cephalopoda, which means 'head foot'.
The spiral shell of this chambered nautilus is thin and smooth with a brown and white pattern. Up to 30 chambers are created in the shell as the animal increases in size and moves to occupy the outermost chamber.
It comprises 6 very similar species in 2 genera, the type of which is the genus Nautilus. The name chambered nautilus is also used for any species of the Nautilidae, though it more specifically refers to the species Nautilus pompilius suluensis.
Coloration reflects the octopus mood. White is for fear, red is for anger, and brown is the usual color. The octopuses lack any internal shell. Their closest relatives are the chambered nautilus, cuttlefish and squids.
 See also: Nautilus, Cephalopod, Octopus, Cuttlefish, Squid
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