Nautilus Shells 4-5” Parl Chambered fire and instead feed by passively

and instead feed by passively capturing prey items such as larvae or small crustaceans

Air is moved through the many chambers to control buoyancy

the sea star actually extends its stomach out through its mouth and digests its prey externally

Pinctada is a genus of saltwater oysters

They do produce a hard calcium/argonite skeleton

Nautilus Shells 4-5” Parl Chambered fire and instead feed by passivelyNautilus 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