He has been swimming against the glass of his aquarium a lot lately. He has done this for many many years, however I have just noticed it has been a lot lately. Could this be bruises on his face from swimming against the glass aggressively? Or could it be something else? If it is in fact bruising, I would think it would hurt and he would stop doing it, but when I sit with him he continues doing it as if he is in no pain at all.
Any help is greatly appreciated!


