Nautilus Shells 4-5” Parl Chambered fire the sea star actually extends

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

Hermit crabs

The population density of these sponges is going down because of oil spills and other pollution

They do produce a hard calcium/argonite skeleton

This is a tiger Nautilis shell on a mahogany wooden stand

Nautilus Shells 4-5” Parl Chambered fire the sea star actually extendsNautilus 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