My LFS had a dragon wrasse and they had a few hermits in the tank for snacks I guess. That thing annihilates like any hermits or inverts. It was digging through the rubble on the bottom with its snout, and when it got the hermit it threw it around the tank a few times and then just got it out and ate it. I also hear they get quite bit...quite big being like around 1' long and fat too. You could try it but if it gets too big you might need to take it out.