Also called Balloonfish. Light grey-brown with white underside. Numerous long, moveable spines. Covered with small black spots except on the fins. Brown bar under the eye and several brown blotches on its back. Solitary. When threatened they swell their body until it is three times its usually size, and the body become rigid. It inflates itself by pumping water into its stomach. The stomach expands to nearly a hundred times its original volume, which is made possible by the pleating within the stomach.