I have a 55 gallon aquarium set up and my angel fish that I got a couple days ago tends to always be on the left side of the aquarium, should I be worried?
I keep my filter on the right side of the tank if that means anything
Like the person above said he may have set up his territory there, or he may be avoiding something on the right side. Is the filter over there, pointy object, a bright light? He may just be nervous since you just got him.