Hi:
you mean do they bite you? they shouldn't , they are more interested in food.
As far as food remember in the wild these fish eat crabs, shrimp, and inverts. I would feed a varied diet of shrimp w/ shell on, chunks of crab(like cut a blue crab into 4 chunks and feed), squid,silversides, etc.
Often times they have to been weened onto the foods above, but they will learn to eat it if they are young. You prolly will have to stick feed them to bump the food into their face before they will eat it.
If they are small they shouldn't eat a cleaner shrimp
Have you read up on these fish?
frank