I have had two clowns (mated pair) jump three times. On two of the occasions I was able to throw the clown back in, and although it looked dead it began breathing heavily at first, then swimming a little bit and about 24 hours later it was back to normal. Sadly my female jumped out about a year ago and she ended up dying. I had had the mated pair for a little over ten years, so it was sad to see her go. I was worried about my little male so I ended up purchasing another clown hoping that my little male would become the female. Turns out that the new clown I purchased became the female. I have since purchased an anemone (about 6 months ago) and the female clown lets the male clown in only at night. I put the anemone at the bottom of the tank on purpose so that the clown stay away from jumping out and so far it has worked well. Good luck!
