hmm.. do limpets exhibit such a large, covering skirt? I have seen this one since you responded, and there does seem to be a hard shell visible underneath this semi-translucent skirt..
Yep, there ae quite a few limpets that have a skirt. Yours is uncommon I think. The ones I've seen are usually coal black but the shell is white. Sometimes it looks like a black nudi and sometimes it looks like a skunk