Is this normal

[tjay]

Well my ponies have been in the tank for about two hours and everything looks good so far except

Our male appears to be sparing with his reflection in the glass (black back)
he almost appears to be head butting his reflection.

Is this normal?
should I be concerned?

[gomd]

It seems to me that he is dancing. Our male dances every day for the female. Maybe he sees his reflection in the glass and is dancing for it.

[whatnot45]

i had a damselfish that did that! lol he spent hours and hours trying to fight his reflection in the glass. Eventually he figured it out and stopped lol

[LisaD]

normal behavior