I don't know if this is normal, but thought i'd see what kind of experience others out there have had. I've had my Yellow Watchman for almost 2 years now. Two months ago I added the Mandarin. Over the last month these two have become inseparable. They sit side by side, maybe an inch apart, perched on the same rock watching what goes on with the other inhabitants. It's like two old men sitting on the front porch. I've never seen a mandarin so social. Anyway just curious about similar experiences with odd pairings other RCers have had. On the bright side my wife loves it and spends a lot more time staring at the tank now.