Goldfish fish only appear to be blowing bubbles as it opens its mouth to draw in water for oxygen absorption. Sometimes as the fish opens its mouth, air escapes and creates a pocket, which forms into a bubble and makes it appear as if the fish is blowing bubbles.Know More
Goldfish, like all other fish, breathe oxygen. However, unlike mammals that use lungs to breathe in air for oxygen absorption, goldfish use an organ known as gills. According to the Northeast Fisheries Science Center, fish do not breathe in water, but draw in water through the mouth to allow it to pass over the gills. As the water passes over the fine gill membranes, the gills absorb the oxygen from the water. The oxygen dissolves into the blood vessels of the gills and is passed into the bloodstream of the goldfish. Once the blood is oxygenated, the blood is pumped back through the fish’s body.
A gas exchange also occurs at the gills. As the gills absorb the oxygen, it also releases carbon dioxide into the water. Then the water, which is now filled with carbon dioxide, is released and passed out of the gills through the operculum. Other aquatic invertebrates that have gills include crabs and mollusks.Learn more about Aquatic Pets
Betta fish primarily make bubbles to construct nests for their eggs and fry. Only male betta fish, which are also known as Siamese fighting fish, create such nests. Male betta fish are the only ones that provide parental care.Full Answer >
According to FishChannel.com, determining the gender of a goldfish can be difficult, as the fish are weakly dimorphic. However, depending on when the fish are checked, it can be possible to determine their gender based on physical differences.Full Answer >
When kept in captivity, goldfish live anywhere from a few months to 45 years depending on the size of their habitat and how well they are cared for. Goldfish kept in bowls have the shortest lifespan; with proper cleaning and feeding, they can survive for about five years.Full Answer >
Adult goldfish will eat baby goldfish when they are placed in the same tank. Goldfish females will also eat the eggs as soon as the male has fertilized them, so it’s a good idea to remove her and the male from the tank once she has spawned and the eggs have been fertilized.Full Answer >