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How old would it be?
05-29-2009, 08:56 AM,
#1
How old would it be?
I've got a 230mm shell that has been identified as an emperor's helmet shell from the Caribbean. How old would the shell be?  

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06-04-2009, 06:00 PM,
#2
How old would it be?
Unfortunately there is little information available on the growth rates of molluscs, except perhaps for a few commercially important species like scallops and pearl oysters.  You may be thinking that such a large shell must be very old.  That is most likely not true.  I would expect that a species like this could reach this size in a few years.  The actual rate of growth depends on availability of food, average water temperature, and other environmental factors.
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