Nautilus Shells 7”+ Pearl Chambered knobby On deep reefs

On deep reefs

but the color of the animal in those white-shelled abnormalities is always the usual velvety jet-black

Young shells have weak vertical ridges

Their nervous ganglia are concentrated in the visceral region

making them one of the largest mollusc species in the world

Nautilus Shells 7”+ Pearl Chambered knobby On deep reefsNautilus have a well developed nervous system and highly developed eyes. Surrounding the mouth are many tentacles. Nautilus are the only cephalopod to have a true external shell. Naturalists, mathematicians and physicists have been fascinated for years by the form of this shell. The spirally coiled, chambered shell is perfectly proportioned mathematically, a remarkable feat of natural engineering. Air is moved through the many chambers to control