Nautilus pompilius

Nautilus pompilius is a marine mollusk known as a nautilus, a type of cephalopod related to squids and octopuses. It has a coiled, external shell divided into chambers, which it uses for buoyancy by adjusting gas and liquid levels. The nautilus moves gracefully through the water using its tentacle-like arms and a jet propulsion system. Its shell features a spiral pattern with some of the oldest shells being over 100 years old. Nautiluses are deep-sea dwellers, and their unique shell structure provides insight into evolutionary biology and marine ecosystems.