Well I just went down stairs after getting home and found one of my three new multibar angels (http://reefcentral.com/forums/showthread.php?t=1772635) was lying on its side in a pipe. When it saw me, it quickly "got up" but had a dark "saddle" type thing on it's back and didn't seem to be able to stay up in the water so would quickly sink back down. It's the largest of the three I have, and is the only one that really doesn't seem to have any nipped fins. I did briefly see one of the other angels turn on its side on top of the angel and sort of brush it with its tail (sort of like a tang does). It seemed like it was trying to keep the ill angel on the bottom of the aquarium (not that it really needed to be doing this in order for that to happen) and seemed aggressive, however not "damage causing". The sick one is also breathing very hard. None of the fish have eaten since they arrived Friday, however I was told they were eating before they were shipped. Here's some pics: