The possible "double entendre" in my quesion re Cyp. color/pattern
variation, was quite unintentional!! Sorry if it inadvertantly offended
anyone.
Despite Mark's interesting anecdote, however, i do not feel the
question has been settled. What are the theories? Are cowries' shells
visible to predators very often? Do the colors&patterns sometimes
factor in mating displays? I am genuinely curious!!
-Ross M.