All of the fish seem pretty safe, but I'd keep an eye on the Harlequin since their favorite foods are crustaceans and mussels (and maybe clams?).
Also keep an eye on the Coral Beauty -- all pygmy angels are "iffy" in a reef tank. Some won't bother a thing, others may become curious and start nipping on your coral or clams. I had a Coral Beauty in my reef and he never bothered a thing, but I also kept him well fed so maybe that helped.
Oh one more thing. Your darkfin hind probably prefers a dimly lit tank, since they like to hang out under rock ledges. This would be an opposite environment for a clam, which needs bright light to flourish.
i wouldn’t trust a angel with a clam! my eibli has nipped every polyp in the tank and is now into the xenia. you might be ok, but would you want to spend the money to find out? a clam is pretty hard to resist for a curious angel.
The coral beauty is one of three fish I have with the clam and they all do fine. I ended up lucky as the angel doesn't go after anything. If your coral beauty does not do after existing polyps you may wish to try a clam- but keep a close eye on them. Or if the clam is existing and you are adding fish buy the angel at a LFS that will take it back if it goes after clams.
-Danny
[ February 03, 2002: Message edited by: danny150 ]</p>
My flame occasionally nips the mantle of my derasa, leaving little mouth-print nip's. The clam doesn't seem to care though, and keeps on growing and opening up like nothing happened. He's been doing this for over a year. They are iffy, but IMO worth it if you get a nice one.
BTW, leave the cleaner wrasse IN THE OCEAN. Do a search for cleaner wrasse and you'll understand how not good of an idea it is.