I see these live clams in Publix all the time - White and 55 cents each. I've never thought of adding them to my tank, but I saw some in a LFS the other day listed as "cleaner clams". I got this picture from the Publix website, but this is the type of clam it was... I think I'm bowing out on these, but it made me wonder, is this a common invert for the reef tank?