Nipping starfish

[Judebug1823]

I noticed yesterday that my clownfish was nipping at my CCS on the arms. I wasn't sure if he was doing it because the CCS had parked himself in the clownfishes chosen corner to swim in, and was just being territorial. But now the starfish is on the neighboring tank glass, and the clownfish is still nipping at his legs. Is there anything I should be concerned about?

 

[lapin]

How far away is it?
Do you have a pair of clowns?

 

[Judebug1823]

How far away is it?
Do you have a pair of clowns?

Its still relatively close. Maybe 6 inches away. And no I only have the singular clownfish. The starfish has since placed himself back in the corner