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Chambered Nautilus

Nautilus pompilius

The chambered nautilus (Nautilus pompilius) is a marine animal belonging to the cephalopod class, which also includes octopuses and squids. It is named for the distinct chambers, or compartments, that make up its shell, which is typically a creamy white color with brown stripes.

 The chambered nautilus grows to an average size of 20-30 centimeters (8-12 inches) in diameter, although some individuals may reach up to 40 centimeters (16 inches).

The chambered nautilus is found in the shallow waters of the Indo-Pacific region, including the waters around Australia, New Guinea, and the Philippines.

 They typically live at depths of 100-700 meters (328-2297 feet), where they can be found in a variety of habitats, such as coral reefs, seagrass beds, and rocky bottoms.

The chambered nautilus is a carnivorous animal and feeds on small crustaceans and mollusks, which it catches using its tentacles. 

It has a unique feeding mechanism in which it uses jets of water to uncover buried prey and then uses its tentacles to capture it.

The chambered nautilus is known for its unique behavior of periodically moving between the different chambers of its shell. This behavior is thought to serve a number of purposes, including regulating its buoyancy, communication, and possibly even protection from predators.

 The chambered nautilus is also able to change the color of its skin, although not to the same extent as other cephalopods such as cuttlefish.

The chambered nautilus belongs to the species Nautilus pompilius and the family Nautilidae. As mentioned earlier, it is a type of cephalopod, a group of marine animals known for their advanced nervous systems and complex behaviors. 

The chambered nautilus is the only surviving member of its genus and family, making it a living fossil that has remained largely unchanged for millions of years.

Chambered Nautilus Graphic
By © Hans Hillewaert, CC BY-SA 4.0,
Chambered Nautilus Clickable
By Profberger at English Wikipedia, CC BY 2.5,
"Chambered Nautilus, starboard fore quarter P4181211" by wbaiv is licensed under CC BY-SA 2.0.
Chambered Nautilus photo
"Chambered Nautilus straight-on P4181213" by wbaiv is licensed under CC BY-SA 2.0.