Stars N Stripes. are the corals that they wont eat?

are there corals that a stars and stripe wont eat? i added one to my tank recently, which already had some GSP and kenya tree, i got him knowing that he would probably eat the coral but to date he hasnt touched them. the only thing he has eatin is a turbo. i want to add some zoos if at all possible. also i was wanting to add a rectanglur trigger in the future. i have had one years ago which posed no problems in then my full reef. any thoughts?

 

no clue about the the puffer. but it probably wont eat zoos, for long anyway there posioness lol.
i had a niger trigger wasn't interested in coral just shrimp and stuff. the rectanglur is supposed to be nice young and mean old.

 

They probably won't eat soft corals and probably many lps and sps, not saying that he won't. I believe the main problem is with them eating snails, crabs and shrimp.