Undulated Trigger, I had one 14 years ago. Stood up to a 6" Clown Trigger, gave it to my brother inlaw and it killed his 4" Niger Trigger. Oh yea I forgot to post the size 2". A great single species fish that deserves his own tank. I would try Frogspawn, GSP, Kenyan Tree, Xenia Corals to house with him. Brains are not safe with most fish.