So I've had my goldfish for 7 years. I honestly have no idea how they're still alive, but I have grown super attached to the little guys, and I am hoping that someone can give me some insight into their behavior. They seem alright and not distressed, but they both seem to like breathing air or something sometimes. I was going to take a picture of it, but of course as soon as I picked up my camera, they stopped. They aren't constantly do it, but just every now and then they'll swim up to the top of the tank and breathe for a sec and then go back to swimming around the bottom. Everything is clean, the tank is brand new (just got it on 4 days ago), and they seem to like it, but I just don't know why they do that. Does anyone know?