using their gills they obtain oxygen from the top of the water.
Oxygen.
The goldfish will get more oxygen in the day, but at night, they will be competing for oxygen.
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.
The same reason you run more actively with air in the atmosphere. Without air, and therefore oxygen, you and the goldfish will suffocate, making it difficult to swim or run.You take in oxygen through your lungs; the goldfish takes in oxygen through its gills.
yes
Yes, like all pet fish, goldfish need more oxygen than can be provided by just a bowl of water.
No. Water is oxygen to them so they need to be in water in the plastic bowl.
Yes, a goldfish's respiration requires Oxygen in order to work. Without oxygen, the fish's body could not perform essential bodily functions and would thus cause the fish to die. Oddly enough, if you were to put a goldfish in pure oxygen then it would still die. This is because it's gills need water in order to receive oxygen molecules.
Goldfish blow bubbles as a way to regulate their oxygen intake and release excess gases from their bodies. This behavior helps them maintain proper oxygen levels in their bodies and stay healthy.
It's typically not recommended. Goldfish are cold water fish, and are used to the levels of dissolved oxygen in colder waters. Since warmer water holds less dissolved oxygen than cold water, it may negatively impact the health of your goldfish.
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.
Goldfish bubbles, also known as air bubbles or oxygen bubbles, form in their aquarium due to a process called "gulping." Goldfish gulp air at the water's surface, which gets trapped in their digestive system and is released as bubbles when they swim. This behavior helps goldfish regulate their buoyancy and maintain proper oxygen levels in their bodies.