Yellow Tang - pacing in the corner
My Yellow tang that has been in the tank for about 6 weeks or so has started pacing in the corner on one side of the tank. She seems to be aggressively chasing something, but there's nothing there. She eats fine and sleeps in her normal cove. She has one spot on her fin that has been there for weeks. I removed one, but could not get that one off. It has not changed in signs and she hasn't shown any signs of distress until the last few days...
125 gal mixed REEF