Pearlized Nautilus Seashell

Nautilus is a genus of cephalopods, commonly known as the chambered nautilus. They are a type of marine animal that belongs to the phylum Mollusca.

Here are some interesting facts about nautiluses:

1. **Unique Shell**: Nautiluses have a unique, spiral shell that is divided into chambers. The shell is made of calcium carbonate and is secreted by the animal's mantle.
2. **Chambered Shell**: The shell is divided into chambers, which are connected by a siphuncle. As the nautilus grows, it adds new chambers to its shell, and the older chambers are gradually filled with gas.
3. **Gas-filled Chambers**: The gas-filled chambers allow the nautilus to control its buoyancy and depth in the water. It can adjust the amount of gas in its chambers to rise or sink.
4. **Slow Swimmers**: Nautiluses are slow swimmers, moving through the water at a pace of about 0.5 to 1.5 meters per second (1.6 to 3.6 feet per second).
5. **Deep-Sea Dwellers**: Nautiluses are found in the Nautilus!