Question

The Nautilus' curly shell is mostly fill with gas, to help float in mid-water.​

Answer 1

Answer:

The nautilus uses this organ to control the volumes of water and gases within each of its shell chambers to regulate its buoyancy. ... With more gas in the chamber, the overall density of the Nautilus decreases while its buoyancy increases, enabling it to float upward in the water column.

Answer 2

Explanation:

The nautilus uses this organ to control the volumes of water and gases within each of its shell chambers to regulate its buoyancy. ... With more gas in the chamber, the overall density of the Nautilus decreases while its buoyancy increases, enabling it to float upward in the water column.