My reef has a Niger and PInk Tail Trigger, Porcupine Puffer (the reason I got into the hobby), Foxface, Sixline Wrasse, 4 Chromis, 1 Azure Damsel and a Skunk Cleaner Shrimp... I recently took most of my corals out and put them in a smaller tank, because I want to add a Blue Face Angel fish, but I still have Purple and Green Monti Caps, Superman Monti, Large Galaxy Coral, Anthelia, Finger Leather, Acropora, Birdsnest, Purple Stylophora, and Tri-Color Acro. Plus Mushrooms and Kenya Trees... So far the puffer has been a model citizen as long as your not a Hermit Crab or Nassarius Snail... He gets a little crazy at feeding time and might break off a branch of SPS, but I just add that to the frag rack... Hiding is normal, and after he/she get's to know you, it will be in your face every time you look in the tank, that's how mine acts... lol Oh, this is in a 180 gallon too, in case that helps...