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 Encyclopaedia Britannica, the goldfish, a member of the carp family that originated from ponds in East Asia, is an egg-laying fish. A fish that lays eggs cannot be pregnant, and therefore no special designation exists for a pregnant goldfish.Full Answer >
A number of quick, relatively painless methods have been devised to humanely dispatch fish. A commonly used method is clove oil to anesthetize the fish, followed by an alcohol bath to kill the fish. Another option is to add eight Alka-Seltzer tablets per gallon of water, which releases carbon dioxide to kill the fish quickly. However, RateMyFishTank.com suggests freezing the fish afterwards to ensure that it is dead.Full Answer >
Goldfish live in temperate bodies of freshwater and have a preference for murky conditions. This breed is hardy and can endure temperatures near freezing, provided their habitat has enough oxygen and remains unfrozen. In the winter, outdoor goldfish exhibit dramatically decreased activity and remain in this state until spring.Full Answer >