Nautiluses, the "Sailors," are  easily the coolest molluscs of the  sea, of which Captain Nemo is a fan.  Like the coelacanth, the nautilus is  a living fossil that has remained  virtually the same over millions of  years, and it is the only member of  its family to do so. Since its  introduction during the Triassic  Period, it survived the Cretaceous- Paleogene extinction event and still  lives today. Nowadays, one can find nautiluses in deep waters of the  Indo-Pacific Ocean, which spans  across Southeast Africa, the Indian  Ocean, Southeast Asia, Oceania, and  the Pacific. There are also a few  places where they can be found in  shallow waters, as well.  Through a system in its living chamber, the nautilus employs jet propulsion to adjust buoyancy; unlike other animals, this lets it safely move from deep waters directly to the surface without damage from the reduced pressure.  Its poor vision suggests that it uses its sense of smell for  foraging and locating potential  mates. Nautiluses live far longer  than most cephalopods (twenty years)  but they typically reach sexual  maturity at the relatively late age  of fifteen. These creatures are  scavengers and opportunistic  predators, eating the molts of  lobsters, hermit crabs, and carrion.