I currently have a Humu Humu Trigger fish in my 120g reef with zero problems. I also had a niger trigger which committed suicide not to long ago but had zero issues with him also. I have the humu humu with the following fish/invertibrates:
- Yellow Tang
- Scopas Tang
- Valamingi Tang
- 6 Chromis
- 2 Clown
- Flame Angel
- Lawnmower Blenny
- Yellow tail damsel
- 1 cleaner shrimp
- 1 fire shrimp
- snails/hermit crabs
I also have all different types of corals which he hasnt touched at all. I think the key is to never let him get hungry!