My biggest and oldest Zebra Danio went missing over the weekend. I was out of town, and when I checked the tank Monday morning, only two Zebras instead of three. I carefully checked the tank's nooks and crannies for a body, but no luck. I even got a flashlight and checked the floor around the tank in case it managed to jump out of the small openings in the hood. This is the first time I have lost a fish and not been able to find its body! Happened much to any of you??