I just talked to a guy last Thursday who was returning his puffer to the LFS. He has a reef tank and he said that it tear up his corals pretty bad. The puffer was only 1" and my friend who had reef tanks forever told me that in the wild that Triggers would chew on corals to feed on worms, which I feed my Humu Humu worms often as a supplement other then Formula for Triggers, Formula Two, live fish, brine shrimp, etc. So I guess both are just as bad with reef tanks. I call my friend up too much to talk about fish tanks...lol Also we rented "Deep Blue Sea" (IF I have the title correct), we watch a Trigger chew up corals and poop out sand (crushed coral). It mentioned about the stuffs being pooped out make up part of the sand bed around it. Can't remember what type of Trigger it was though, it says it feeds on corals often. Just something I remembered from watching the DVD. :happyfish