Nautilus is a kind of marine benthic mollusk. They usually inhabit the seabed of 100-600 meters and mainly feed on small fish, shrimp, crabs and other small mollusks. Because Nautilus has a beautiful appearance, many Nautilus are sold as handicrafts. In addition, Nautilus itself has high scientific value.
The shell of the Nautilus is very beautiful, and the structure is also quite characteristic. The compartments in the shell turn from small to smooth, which determines the rise and fall of the Nautilus. This is the key to the concept of submarine. The world’s first battery submarine and the first nuclear submarine were named Nautilus.