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Shrll Families
Nautilidae Family

Shell Families

  1. Condiae Family
  2. Cowrie Family
  3. Murex Family
  4. Spondylus Family
  5. Turbinidae Family
  6. Volutidae Family
  7. Argonautidae Family
  8. Nautilidae Family
  9. Chamidae Family
  10. Dried Sea Life Family
  11. Strombidae Family
  12. Trochidae Family
  13. Myacidae Family
  14. Haliotidae Family
  15. Tunnidae Family
  16. Specimen Family
  17. Olividae Family
  18. Cassidae Family
  19. Pleurotomariidae Family
  20. Dentaliidae Family
  21. Large Decorative Shells
  22. Angariinae Family
  23. Xenophoridae Family
  24. Neritidae Family

Nautilus Family
  Nautilus Family


The Nautilus pompilius is not only a fascinating decoratorís shell but a mathematical miracle of nature. If you cut the shell in half, as the one pictured here, you can see this mystery very clearly.

Nautilus pompilius Cut in Half

As the animal in the shell grows it builds another room slightly larger than the one it presently resides in, preparing for the day it will move into the new addition to its house. The animal paints each room the same pearly white color . Once it completes its new room it moves its body into it and seals the empty room, with one exception. It leaves a small round opening through which it connects its body with a tube that it uses to connect itself to the empty chamber. It is through this tube that the animal can adjust air inside the empty chambers to move up and down within the ocean. This, along with its siphon tube through which it blows water out like a jet plane, accounts for its mobility. If you look very close at the spirals in the cut-away you will notice that each of the spirals forming the chambers increases in size but is unchanged with each curve. This is what makes it a mathematical miracle of nature, or why is called a perfect equiangular or logarithmic spiral.

When we observe how our modern day submarine navigates throughout the ocean we are reminded of how the Chamber Nautilus travels.

If you do not have a Chambered Nautilus in your collection, try to acquire one as soon as possible. They are becoming harder and harder to obtain and the cost is constantly increasing.

Nautilus Family

Nautilus Half
Nautilus Half
Larger image

Nautilus Natural Whole
Nautilus Natural Whole
Larger image

Nautilus Whole Pearlized
Nautilus Whole Pearlized
Larger image


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