then it is dead or{asleep}for little kids
A goldfish is dead when you touch it and it doesn't react. You can also know if it is floating lifelessly on the surface of the water, or in some cases (like mine), lying on the bottom of the tank lifelessly.
Goldfish gulp air at the water's surface to regulate their buoyancy and maintain proper oxygen levels in their bodies.
Goldfish make bubbles on the surface of the water by releasing air from their swim bladders through their mouths. This process is called "gulp breathing."
You would be lying on the surface tension of the water, with the pressure of your body evenly distributed across the water. The surface tension allows you to float effortlessly.
If it was taking air and has now stopped it is probably dead. Goldfish only take air from the surface of the water if their water is low in oxygen and full of ammonia. (ie. poisonous) You have killed your fish by neglecting to give it proper and regular water changes.
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.
Goldfish make bubbles underwater by releasing air from their gills, which creates bubbles that rise to the surface of the water.
Goldfish come to the top of the water to breathe air because they have a special organ called a labyrinth organ that allows them to take in oxygen from the surface.
A goldfish is not from the fish type of anabantid (labyrinth fish) who would actually really drown if they do not swim up to the water surface to breathe.
Most oases get their water from springs that reach the surface of the desert in low lying areas.
Goldfish may hang out at the top of the tank because they are trying to get more oxygen from the surface of the water. This behavior can indicate that the water in the tank may not have enough oxygen for them to breathe comfortably.
An underwater ridge near the surface of the water is called a seamount. These are elevated features on the seafloor that do not reach the surface of the water.