Perhaps so, I have only cleaned X. conchyliophora from the Caribbean. However, I have some other species in my collection which have had attachments fall off, both rocks and shells. Leslie ------------------------------------- Maybe the species of Xeno makes a difference. The ones I've collect were conchyliophora, which are among the sturdier species. Pallidula and the like have delicate shells and likely their attachments are more delicate? Ellen ---------------------------------------------------------------------- [log in to unmask] - a forum for informal discussions on molluscs To leave this list, click on the following web link: http://listserv.uga.edu/cgi-bin/wa?SUBED1=conch-l&A=1 Type your email address and name in the appropriate box and click leave the list. ----------------------------------------------------------------------