Can a fish from your tank just disappear? I have a tank of 13 cichlids. We siphoned the tank and did our normal water change and counted all the fish to make sure they were there (because we moved the mountains and rocks and stuff) and today I noticed that one of our cobalt blue zebras is missing! I can't find her anywhere!Do you think she could be gone? Could they have eaten her? Or do you think somewhere along the line I missed her somewhere? I am sad My question though, has anyone ever had that happen? Or could she have been eaten?