Yellow coris wrasse swimming against reflection

[tootsmcgee]

My yellow coris wrasse is fighting his reflection. I'm afraid that he will hurt his jaw if he keeps it up. He does this all day. Is there a solution to this problem? He is the only fish in the tank so I'm thinking once I add more he will be distracted with all the other activity and stop. Is it possible I'm not feeding enough?

thanks for the help