We lost our tiger watchman goby for about a week. He'd been relatively active and social, so it was a surprise that he wouldn't be visible for that long. On top of that, for a bottom feeder, I never expected that jumping and sump or carpet surfing would be an issue. After the week is done and still no sight, I'm sitting in the chair next to the tank and my wife starts to freak out, looking at the floor next to me. I look down and there's mr. goby, perched up on his pectorals staring at us, but dry as a bone and frozen in history. He'd probably been there all week and we didn't notice. (no comments on our housekeeping skills thanks). I thought I had the tank sealed off pretty good, but I'm thinking twice now about that zebra moray I was going to get.