Honestly, it was very lucky but I was going off fish anatomy diagrams and the video in the reef builders thread. When I pushed the needle in the first time, I could tell I was in there because I could feel the lack of pressure and I was sucking air out through the needle. And, if you listen closely near the end when I say "did you hear that," you can hear the air release when I removed the needle. Must have been a lot of trauma for the fish. I wish I would have had some MS-222 on hand. It takes several days to ship and I was afraid to wait that long.
By the way, I just looked at your avatar more closely. My favorite fish and the reason I have the trio in my avatar. I have had terrible luck trying to keep them so I've given up. Just spectacularly colored fish though!!