Anyone else have fish that do "odd" things?

[Matt]

I have a sixline wrasse and watchman goby that seem to prefer life in the overflow to life in the display, but other than that, fairly normal!

I wonder what's on the other side of the glass where your tang is freaking out? Is there a mirror effect there or something?

[christyf5]

No I leave that side of the tank covered with algae/coralline because the bangaii cardinal often has little lovefests/freakouts with his reflection and I thought it was stressing him out too much.

Although I do notice with all the rubbing up against the glass, the regal has created a couple of "windows to the outside" perhaps he can see himself now. I wonder if I could cut down on the reflection by putting colored paper against the tank?