Goldfish | Fishkeeping, Origin, Feeding, Water Requirements

Definition of Goldfish:

Goldfish is a type of fish from the carp family. With the crossing method, many varieties were produced in different colors and body structure. Most goldfish species such as comet goldfish, shubunkin goldfish can survive in cold water. Some types can reach 35 cm in length. This type of fish, which is known by almost everyone and sold best in pet shops, is very easy to keep. Although they are sold in a bowl, the small volume of the bowl and its round shape is not suitable for this fish. When fed in a suitable environment, they can live for 35 years and their lifespan are generally between 10-35 years. It is very enjoyable to watch their specific slow goldfish swimming in a live aquarium.

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What is Goldfish Scientific Name And Classification?

Class Actinopterygii / Order Cypriniformes / Family Cyprinidae / Genus Carassius / Species Carassius auratus 

Other Names for Goldfish Common Goldfish, Shubunkin, Fantail Goldfish, Comet Goldfish,  Fancy Goldfish

Are Goldfish Easy to Keep? 

They are very easy to keep.


What is The Origin of Goldfish?

They are ornamental fish that are not naturally found in wild waterways. They selectively bred from Crucian Carp for hundreds of years, and now considered a separate species.

What Foods Can Goldfish Eat?

They are omnivores and should be fed a well-balanced diet that includes fresh foods. Like most fish, goldfish do not stop eating by themselves. In case of feeding, there is a possibility of obstruction of the intestines. It is recommended to eat foods low in sugar and starch. They can be fed with foods such as greens such as cabbage, spinach, peas, shrimp, oysters, and aquatic plants, and they are usually fed with ready-made food prepared for goldfish. When feeding with pellet or flake food, it will be beneficial to pre-wet the feeds and not remain above the water when left in the aquarium. Swallowing air while eating goldfish on the water is known to cause digestive disorders.


What is Goldfish Tank Compatibility?

They are a slow-moving species and are generally recommended to feed on their own species. It is recommended to have 2 female fish for one male fish. However, it can be fed in the same aquarium with other peaceful species. It is not recommended to feed in the same place with small species of fish (neon tetra, cardinal tetra, etc.). Although goldfish are peaceful fish, they tend to swallow small species of fish. They love to eat aquatic plants and it is not recommended to have plants in the aquarium. If plants are desired to be kept in the aquarium, hard-leaved and rooted plants (anubias species, etc.) should be preferred.

What Size Tank Should Goldfish Live in?

It is recommended that the fish tank sizes; 40 liters (10 gallons) for fish such as oranda goldfish, ryukin goldfish, ranchu goldfish; 70 liters (18 gallons) for one-tailed and larger ones such as Comet goldfish, Shubunkin goldfish. They are not recommended to be fed in the bowl!


What are Water Requirements for Goldfish?

For fancy goldfish (such as ranchu goldfish, rykuin goldfish) a heater is needed, it is an important equipment for keeping the temperature constant, not heating the water. Wild variants can live between 9-30° C (49-86 ° F), while fancy species can live between  18 - 25 ° (64-77 ° F).

Ideal levels for goldfish would be 6.5 - 8.0 pH. However, the water hardness of 5-25 ° d will be appropriate.

How is the Behaviour of Goldfish?

They are very social and peaceful fish.

How to Identify Goldfish Gender?

It is difficult to determine the gender of goldfish. Reproductive tubercles develop on the gill lids and pectoral fins of male goldfish. Female goldfish have more rounded convex vents, while male fish have finer concave vents.  They reach adulthood at the age of 1 year. They mate only during the breeding season (spring).

How to Breed Goldfish?

They reproduce by shedding eggs. If the edge of the gill covers turns white during breeding, this is a male fish. Prepared to lay eggs, the belly of the female fish swells, spots appear on the male's gill covers. After the female has laid eggs, the male ejaculates his sperm. After spawning, fish should be taken to a different aquarium. Methylene blue solution should be added to the egg tank and the ventilation should be run continuously. Glass balls or plastic grid can be placed at the bottom of the tank so that the fish do not eat their own eggs.


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