condy and shrimp

Ok, so i've looked around on the net before buying and decided to go with a purple condy that I added to my tank. They condy looked to be doing great except my 2 pepermint shrimp and now this morning my arrow crab are sitting in it and making its tentacles much shorter and shriveled looking. Are these guys just trying to eat food off its tentacles or are they actually trying to eat it? I also have a RBTA that they don't seem to bat an eye over. My guess is that even if they aren't trying to eat it, that they could be stressing it out too much?

Thanks,
Mike

 

It now seems as if there is only one peppermint shrimp that is always around the condy, but most of the time now this shrimp is just on the rock beside where the condy decided to relocate to. I think the condy is looking healthy so maybe they were just trying to "steal" some food.

 

Am I asking a dumb question that I should have easily found on the web, or is this that odd that no one knows? Oh wait..maybe everyone is where I wish I were.....on VACATION!