CATDOLL : CATDOLL: There is something white on the goldfish

The white stuff like spider webs on the goldfish's body is Saprolegniasis.

Saprolegniasis often infects injured tissues and dead eggs on the body surface, forming a grayish-white cotton-like covering, also known as cotton wool disease or water cotton wool disease. Also known as skin mold disease or white hair disease, it is one of the fungal diseases of aquatic fish. More than ten pathogens have been found to cause this disease, among which the most common are Saprolegniasis and Cotton mold.

The disease is caused by fungi parasitizing the fish body surface, mainly the fungi of the phylum Mastigomycetes, the subphylum Phycocephala, the class Saprolegniales, the family Saprolegniaceae, the genus Saprolegnia and the genus Mycosporium. The disease is prone to occur when the water temperature is low, so raising the water temperature is the key to treating the disease.

Prevention and management:

The water temperature in the spring stage is more suitable for the reproduction and growth of pathogens. Therefore, preventive work should be done in particular. When cleaning the pond in winter, you can remove excess silt at the bottom of the pond, disinfect it with 200 mg/L quicklime or 20 mg/L bleaching powder, strengthen feeding management, and improve fish disease resistance.

Try to avoid squeezing, collision and scale loss of fish when temporarily rearing them in high-density conditions, or avoid fish injuries during fishing and transportation. When the water temperature is below 15°C, minimize manual operations to prevent stress reactions that may cause abrasions or frostbite.

Before and after stocking fish that have been transported over long distances, disinfect them with 2% to 3% salt water or disinfectants. When broodstock are injured during artificial breeding, 10% potassium permanganate solution can be applied to the wound for disinfection.

The above content refers to Baidu Encyclopedia---Saprolegniasis

The white stuff like spider webs on the goldfish's body is Saprolegniasis.

Saprolegniasis often infects injured tissues and dead eggs on the body surface, forming a grayish-white cotton-like covering, also known as cotton wool disease or water cotton wool disease. Also known as skin mold disease or white hair disease, it is one of the fungal diseases of aquatic fish. More than ten pathogens of this disease have been found so far, among which the most common are Saprolegnia and Cotton mold. The disease is caused by fungi parasitizing the surface of fish, mainly Saprolegnia and Cotton mold of the Saprolegnia order Saprolegniaceae of the fungal phylum Mastigomycetes subphylum Algae Fungi class.

treat:

1. Formalin 100~250ppm, flow bath for 1 hour.

2. Salt (it is best to use non-iodized salt, as excess iodine is harmful to aquatic organisms)

1~1.5%, 20~30 minutes. Refined salt, coarse salt is also acceptable.

3. It is forbidden to eat fish containing malachite green.

4. Antibiotic treatment is required when mixed bacterial infection occurs.

5. Methylene blue 2ppm can be used again the next day to achieve good results. There is no need to change the water in time, and the water color will become lighter as the drug decomposes. You can consider changing the water appropriately after 3 days.

Additional information:

Goldfish and crucian carp belong to the same species and have the same scientific name (Carassius auratus).

Goldfish originated in China and is also called "Jinyuan Xiao Crucian Carp". It is similar to carp (Cyprinus carpio) but has no whiskers. It is an ornamental fish evolved from crucian carp. There are many varieties of goldfish, with colors such as red, orange, purple, blue, black, silver, and five-colored. They are divided into four categories: Wen species, Cao species, Long species, and Dan species. Genetic research on the domestication of goldfish began in the 12th century. After a long period of cultivation, the varieties have been continuously optimized. Now the goldfish in various countries around the world are directly or indirectly introduced from China.

In the history of human civilization, Chinese goldfish has been with human beings for more than a dozen centuries and is the earliest species in the history of ornamental fish in the world. Goldfish is easy to raise, with strange postures, bright colors, generally golden yellow, and beautiful shapes. Fish can beautify the environment and are very popular among people. It is an ornamental fish with Chinese characteristics.

one

Ichthyophthirius

Also known as white spot disease.

[symptom]

It is common for ornamental fish to be infected with Ichthyophthirius spp. In the early stage of infection, white spots are distributed on the chest, back, tail fin and skin of the fish. At this time, the fish will continue to forage as usual. After a few days, white spots will be all over the body, and the fish will lose the ability to move. They will often be sluggish, float on the water surface, swim slowly, have poor appetite, become thin, and have bleeding spots on the skin. Sometimes they will swing left and right, and swim sideways quickly next to the aquarium wall, water plants, and gravel to scratch themselves, and gradually lose balance while swimming. The course of the disease is generally 5 to 10 days. The infection speed is very fast. If the treatment is not timely, it can cause a large number of deaths in a short period of time.

two

Pox

Also known as lymphocystis virus disease.

[symptom]

In the early stage of the disease, many small white spots appear on the skin surface of the diseased fish, covered with two layers of white mucus. As the disease progresses, the number of these white spots gradually increases, the area expands, and the epidermis of the diseased part gradually thickens, sometimes up to 1-5 mm thick, forming paraffin-like "growths", and the surface tissue changes from soft to cartilage-like connective tissue. After these "growths" grow to a certain extent, they will automatically fall off, and then new "growths" will reappear in the original position. If these "growths" occupy most of the surface area of ​​the fish, they will seriously affect the normal growth of the fish, making the fish thin, slow to swim, and even die. If there are not many "growths", it will not have much impact on the fish; generally, cases occur in spring when the water temperature is around 15°C. Because this disease is not widespread, it rarely occurs, and the harm is not great, so it has not attracted much attention.

three

Skin fungus

Also known as Saprolegniasis and white hair disease, it is one of the most common diseases of ornamental fish.

[[symptom]

When catching and transporting ornamental fish, if you are not careful, the fish's skin may be injured, or parasites may invade and damage the skin. The fungal spores may invade the wound, absorb nutrients, and germinate rapidly. One end of the hyphae will go deep into the muscle, and the other end will grow outward, forming cotton-like hyphae. When the fungus first parasitizes, it is difficult to see with the naked eye. By the time you can see it with the naked eye, the hyphae have already invaded the fish's wound and grown from the outside to the inside. The hyphae will entangle and adhere to the cell tissue of the wound, causing tissue necrosis. As the number of cotton-like hyphae increases day by day, the fish body is overloaded, causing abnormal swimming, loss of appetite, and gradual weight loss, leading to death.

After a winter of dormancy or semi-dormancy, early spring goldfish have a much weaker constitution and poorer resistance, making them susceptible to disease and difficult to treat. It is recommended that you buy fish of the year around May when they are less likely to get sick.

If it is nearly translucent white cloud-like, it is a hyperplasia of the body surface mucosa caused by poor water quality.

If it is white hair tufts, or very thick white hair in the shape of a cloud, it is Saprolegniasis.

If it is white and dotted, it is Ichthyophthirius multifiliis.

That's a skin disease. Go to the health center and get some oxytetracycline powder and sprinkle it into the fish tank. It will be fine after a while. I hope you will adopt my advice.