I agree with RFK 100%, but if you really want to get rid of them as mentioned an arrow crab is good, but will fight to the death with CB shrimp, I also believe they are not 100% reef safe, not sure.
Also a Flame Hawk is an excellent choice, plenty of personality and a taste for bristle worms, and possibly hermits, and shrimp! The one I had did not touch my hermits or shrimp but did keep check on my bristle worms.
HTH