I have always felt that there is no such thing as a rare shell. Just shells
that we either don't know enough about their habitant, or haven't found an
economically proficient method of harvesting the shell.
 
I once read that it takes hundreds, perhaps thousands of a specie for it to
maintain a viable population. Does anyone know if that is true? It makes
sense with all the predation, like the cone wars, that there has to be a
sufficient base or the specie would become extinct. Speaking of extinct, I
heard that Cypraea summersi from Tonga was extinct. Does anyone know anything
about this shell? Thanks,
 
Frank Walker
Gems From The Sea
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