Hermit and/or Emerald?
Do you trust them??
Do you have them? If not, what is your CUC made up of?
I'm having what looks to be eaten/picked/etc SPS, which I'm trying to identify the source, and I do have many crabs. I also had a Clown Goby, but he's out already
. I did catch one emerald sitting on an acro this morning and pulled him out of the tank, but there are a few more in there yet.