If the water the fish is in is not changed regularly a goldfish will do this because the oxygen in the water is too low for the fish to absorb it through its gills so it gulps air from the surface of the water. Make sure you change the water in a fish bowl or get an air bubble pump for an aquarium and this will stop this behavior in your goldfish.
Goldfish always go to the top for oxygen. They are known to do this. This is why it is recommended you do not have a really tall tank. I have gold fish and never have a tank over 16 inches tall. In my 40 gallon that is 36" Long x 16" High x 18 " Deep. I have two gold fish that are about 3 inched long in size. But one is a black moor. Both go to top for oxygen even though I have two filters, a 45 and 40, plus two sponge bubbler filters, and two long bubblers in back of aquarium. They are quite healthy and never sick. In fact I saved them from Walmart some time ago. I do know it is better to have a tank that is not tall and goldfish will always go to the top for oxygen. They require more oxygen than many fish. I have another 4 foot long tank that is only 12.5 inches tall with black moors. They too, (as a species of gold fish) go to the top for oxygen. I keep water in top perimeters. and water change as needed. But if your fish show floating signs, give the fish peas. I give my fish peas once a week to keep them from having a swim bladder issue, but if they do, peas cure over night.
Try to have moving water as this creates oxygen. Try to have a tank that is not too tall. I have been told it is best to feed goldfish grandular food or pettet food. Not Flakes! My research has told me flakes can cause swim bladder issue in goldfish..
Your goldfish may be making bubbles in its tank because it is trying to breathe air from the surface of the water. This behavior is normal for goldfish and helps them get oxygen when the water is low in oxygen levels.
yes in fact i have a normal orange goldfish and a panda at home in my fish bowl
the regular kind of goldfish is very hardy, so I believe it is very very normal. :)
Surface friction ALWAYS point parallel to the surface and opposite motion. There must be a normal force for there to be friction
All goldfish types are the same species, so all types can breed.
It is normal most every goldfish does it, don't worry.
Normal reaction refers to the force exerted by a surface in response to an object pressing against it. It is always perpendicular to the surface and acts to support the weight of the object resting on it, preventing it from falling through the surface.
Those sound like the same thing, but its a terribly framed question.
normal fish food
I don't know if it is normal or not, but my sister had goldfish that would jump out of their tank when she would walk into the room. She would have to scoop them up and put them back in.
The normal force, exerted by a surface in contact with an object, always acts perpendicular to the surface and in the direction opposite to gravity to keep the object from falling through the surface.
Goldfish do not get pregnant. They are egg layers. A female goldfish looks a bit chubbier than normal around the tummy when she is in breeding condition.