Ross,
I found this one article at least by the late Dr. Schilder
about animals attaching to cowries.
http://www.cowrys.org/archive/NSN096CY.HTM#A
I recall at least one other but I'll have to search a bit.
For the greatest part, even the Cypraea in surf zones manage
to keep their shells free of attaching life forms. However,
I have seen images of a barnacle covered over by nacre on
a cowry.
Aloha,
Bob Dayle
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