What is nautilus?

More than 400 million years ago, the family nautilus was widely distributed throughout the world's oceans. Numerous fossils will survive to provide tracks on the development of life on Earth, as well as a limited number of individual living species. These animals are known as Nautiluses and are sometimes called "living fossils" because their form remained the same for hundreds of millions of years. Unique cushions of Cefalopod can be found in the Indian and Pacific Oceans living in slots and coral reefs. Unlike other molluscs, Nautilus has a hard outer shell that takes the form of a spiral. As the animal grows, the chambers in the shell, which are filled with gas, seals, so that the shell floats so that Nautilus can swim. The unique air chambers lead to an alternative name, the Nautilus Chamber to distinguish themselves from the paper Nautilus, another animal in the argonaut .

nautilus can have up to 90 grip of tentacles usedto seize prey. Like many other molluscs, Nautilus will emit ink if emphasized or endangered, allowing him to escape. Nautilus also uses the current drive to move by enforcing the air from the shell chamber in which the animal currently lives, the latest and largest. Shell is also designed to help mask the animal and have dark stripes at the top, which is mixed with an ocean day when viewed from above. The bottom of the shell is creamy white.

Many animals are used as a source of food Nautilus, including small fish, crabs and others. The animals are night, they prefer to stay hidden during the day and come out to feed at night, and their shells are resistant to 2,624 feet (800 meters) deep. Animals are also able to fully retreat their shell. The leather hood covers the opening of the shell to further protect Nautilus.

For about 20 years, the service life for Nautilus is. Animals are harvested by humans for their distinct and beautiful shells and are also set inthe more sea animals. They reproduce the eggs every year and the egg takes nine to 12 months to fully develop and hatch. Because the animals take so long to reproduce, concerns about Nautilus protection have been raised, because the excessive hunting of people for their shells can endanger their continuing existence.