breathing quickly

We have had our pair of Kribs for just over a week now. We noticed that one was hiding a lot compared to the other at the back of the tank. When I’ve looked more closely it is breathing very fast and looks like it’s struggling to stay upright. OH has also seen it at the top of the tank and then...

Hi, I’ve attached a youtube video of my Danio which I have had for maybe 3 months now. The last few weeks its been looking really chubby and has an extra kind of hump under its chin. Now it seems to be breathing quickly and keeping away from the others. Is it pregnant and going to lay eggs...