The starry that I posted about earlier in this thread jumped out of the tank this summer. He was a large blenny, probably between 4 & 5 inches in length, a very good fish. The scopas tang and the blenny were best friends, and it almost seemed as if they were actually a mated pair. It was quite something to see. The poor scopas became extremely nervous and shy, mostly hiding in the caves after his buddy vanished.
In September I got a new starry from DD, but I didn't look at the size when I purchased him. He was between a half and three quarters of an inch in length when he got here, the smallest fish I have ever had in the tank. He looked like a little tadpole. I don't think the tang even recognized him as a fish. Well in three months he has grown to 3 inches in length, and the tang has a grazing buddy again. They eat from the algae bag together, but have not yet "bonded" like the original twosome was.
PS - I did put netting up around the tank, sort of like a back stop, around the 2 open ends of the tank. The other 2 are blocked by the canopy doors, so no more jumping casualties are expected.