Help!!! Who's the coral slayer...

Okay, so my tank has been up for about 3 weeks now and everything was going great until Sunday morning when I noticed that one of my button polyps was mission.  After a search I found him, but about half of him was missing.  I placed him in a hole in a rock and  he seems to be recovering...  I've been watching the tank closely for the last two days and everything has been going fine until I went home for lunch today.  My other button polyp which has literally doubled in size over the last few weeks was gone.  I had to disassemble my rock work to find him, I was able to put him in a hole in the rock, but most of the new growth is gone and he isn't looking so good.

Here is the list of suspects: 2 little ocellaris clowns (they look pretty innocent)10 snails, 10 hermit crabs, an emerald crab (he looks pretty suspicious) or a serpent star (he's shady also, I only see him come out after the lights are out)

These are my first two corals, i was hoping to add some more this week, but now I'm afraid that whatever I add will be attacked like my two existing corals. 

Any suggestions?

Thanks,

Tim

I say all clues point to the Emerald. . . .

I had an Emerald Crab and when I put him in there - the first thing he did was pick at the zoos and eat them.  He had to go. 

Tim, do you feed the hermits in the tank too?  Shrimp pellets. . .

Bleh!!  

Tim. . . I would take lil' guy.

I don't like anything that might turn and eat corals.  But that's just me. 

Good job on handling the problem though!

You know the same thing happened to me. . and I took my lil'guy out and then later bought another one and he hasn't touched my corals (yet).

You can always exchange him. . . haha!