What are you concerned about? My Valentini has not shown any interest in corals. She was small when I frist got her, and apparently hunger, because she nipped all the hitchhiking small tube worms from the live rock. They have regenerated and she is no longer interested in them. I housed her with a cleaner shrimp w/out incident, and there are still some ceriths in the tank. I'm not sure if she fed on the Nassarius or not, but I do not see them any longer. Snails and hermit crabs might be at risk. It will depend on the size of the toby and the size of the potential prey, I think, when the toby goes into the tank. She is a great fish, though.