Sorry to hear that, recently I had three fish jump and two mysteriously disappear. I had my yellow watchman jump, my lawnmower blenny (he was my fav), then my diamond goby, and the two mysterious losses were my chromis and carpenter's fairy wrasse. So, I know what you are going through, it sucks, but, look on the bright side now you have room for something new that you may have wanted! Good luck!