Recently my 9 year old son has really gotten into my reef tank, one of the fish he really likes is blennies, as do I. I have had 2 blennies before(previous tanks) and they would fight a bit but nothing really to rough. So my son puts on his little reefin list he wanted a tribal blenny, a starry blenny and a midas blenny. So first we buy a tribal and a starry, they end of best friends, swimming around together, perching on the same rock, etc. Last week I see a midas blenny, and I said what the heck, and bought it also. Now all 3 of them are like a little clan, always on the same rock or same area, no fighting whatsoever. Everything I have read previously was one blenny per tank, unless you have a bigger tank, than maybe 2. We have a 110 and all our blennies are best buds. So, it made me interested to see if anybody else out there has had success with fish you shouldnt keep together, or fish you shouldnt keep in a reef.