The nautilus shell is a beautiful, spiral-shaped shell that belongs to the nautilus, a marine creature found in the deep ocean. This shell is made up of chambers filled with gas, allowing the nautilus to float and move through the water. Its unique design has been admired for centuries and is often associated with the concept of the golden ratio, a mathematical principle found in nature. Inside the shell, the nautilus has a soft body and tentacles that help it catch prey. Unlike many other sea creatures, the nautilus has remained relatively unchanged for millions of years, making it a fascinating example of evolution and adaptation in the ocean.