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.