Emeral Crab appropriate?

[alex1010]

Hi all:
I have a 125 fish only tank with
4 Clowns
1 Foxface
2 Threadfins
1 Boxfish
I need to get a clean up crew I hav 6 hermit crabs but don't quite keep up, I was thinking of adding an Emeral crab and a Serpent Starfish.
Think any of my fish will make a meal of the Emerald or Serpent?
or if you have an Emerald or Serpent Starfish share your experience
Thanks!!
Alex

 

[yosemite sam]

I have a 125 fish only as well with five small (dime-sized bodies) emerald crabs int he clean up crew that seem to do just fine. I don't have any experience with box fish or threadfins, so I can't speak to them, but my gold-stripped maroon clown hasn't bothered any of them. I have about 150 lbs of live rock so the crabs have lots of places to hide out. How much live rock do you have?