Nautiluses are a special group of marine animals that have charmed and captivated humans since the time of ancient civilizations. Nautiluses are popularly known as the chambered nautilus because they possess a special shell that is divided into chambers. While they may look like small, insignificant creatures, they are actually a species that is incredibly ancient and have lasted the test of time. Nautiluses have an incredibly unique shell, which has a series of ever enlarging and tightly coiled chambers that protect their soft bodies. The chambers can be filled with gas by the animal to achieve buoyancy, as well as aiding in their movements through the water. This elegant spiral is often reflected in the art, jewelry and architecture of civilizations that once lived and interacted with these sea creatures. Perhaps one of the most remarkable facts about nautiluses is that, despite living around 500 million years ago, they have not significantly changed and still rummage around for food in the same way as their prehistoric ancestors. In fact, the most unique feature about them - their beautiful, chambered shell - makes them one of the closest living relatives of creatures that lived in the early Cambrian period. So, while nautiluses may appear fairly insignificant today, they have in fact survived the test of time as a species and have played a significant role in human culture, both historically and in current times. Their incredible adaptations and almost unchanged existence since the time of our ancestors make them a special group of animals worth paying attention to.