Hey guys, I got this, what I think to be is a filefish. If he's not eating which seems to be his only interest , he's all over up against the glass like he's trying to get out. And he's done this since the first day I got him months ago. My aquariums 55 gal, he's about 2 1/4". Is he to big for the aquarium? My waters good. I have 4 other smaller fish, they just swim around hang around the rocks. None bother him. Never had a fish do this before. Any thoughts,