Lately my goldfish have been swimming around the top a lot. :confused: They will go a little above the water and come back down.:confused: They will go near the bubbles and come back down. Sometimes they will go all the way down. But most of the time they are swimming around the top. Why are they doing that?

Are they in a tank or a bowl? Regardless of what their habitat is, you need to change the water, the nitrites are probably too high and the fish can barely breath. If he is doing this and his fins are held in tightly next to the body then that is another problem. Change the water first and we will go from there.