You are admiring a very popular species & longtime favorite of collectors worldwide, a Nautilus pompilius pomilius (Linne, 1758) measuring a very large 187mm (or just under 7 1/2")...also known as the "Chambered Nautilus".  An outstanding "Mother of Pearl" coloration is achieved by removing the outer layer of color.  A member of the fabulous Nautilidae family & an excellent addition for any collection & excellent for display purposes anywhere in your home or office.  Thank you for visiting our store this evening...great to see you again.

 

***Special Note:  "Once dominating the ancient seas of the world, the genus "Nautilus" is now limited to fewer than a half dozen living species, all found in the southwestern Pacific.  Dead shells float as far away as East Africa and Japan.  The animal has about 90 tentacles.  The chambers are filled with gas and keep the creature balanced in midwater."