Recently, the fish pond has died, and the dead fish have red and prominent eyes! What s going on?

Recently dead fish in the pond, the dead fish eyes are red and protruding, which may be caused by the following reasons:

1.Hemorrhagic disease: caused by viruses, bacteria (generally thought to be by Monomonas) and parasites that attack the fish body and cause damage to the body or part of the fish.

2.Water quality problems: No matter what kind of water is used to raise fish, it needs to be left or exposed to the sun for 2-3 days before it can be used. If used directly without treatment, it can cause blood congestion in the fin scales and kill the fish at worst.

3.Ammonia poisoning: Fish living in water with ammonia poison for a long time will gradually become weak and easily attacked by viruses in the water.

4.Cloke disease: caused by parasitic larvae of clokes in the eyes of fish.

5.Flooding ponds: Causing sudden degeneration of dead fish, which may be caused by sudden changes in water quality and lack of oxygen in the early morning.

To determine the cause of the dead fish, further observation and testing are required. It is recommended that you take steps to improve water quality and consult a professional for a solution.

However, I think that the bacterial component is relatively large, which may be caused by Gram-negative short bacillus or Edwardian's bacteria, so ** is to use dialdehyde benzabromide solution to splash the whole pool, and the dosage should be tested in the fish medicine instructions. It is best to use the whole pool of fine trichlorfon after 15 days to kill insects, and then regularly disinfect with quicklime or bleaching powder. It's not easy to do and cherish.

The bulging eyes of fish pond fish after death are considered to be hemorrhagic diseases.

The factors that cause hemorrhagic disease in fish are complex, and are generally caused by viral, bacterial and environmental factors

1 Viruses, bacteria (generally believed to be caused by Monomonas) and parasites infect the fish body, causing damage to the whole body or part of the fish.

2 Water quality relationship Whether you use tap water to raise fish, or fish from lakes or wells, you need to stand or be exposed to the sun for 2-3 days before you can use it. If used directly without treatment, it can cause congestion of the fin scales at least and kill the fish at worst.

The phenomenon of fulminant hemorrhagic disease in farmed crucian carp is gradually increasing, and here is a brief introduction to the prevention and control methods of crucian carp fulminant hemorrhagic disease. Symptoms: In the early stage of crucian carp disease, the sides of the fish, eye sockets, gill covers, fins, etc. are slightly congested.

When the disease is severe, the body surface and fins are severely congested, the periorbital hyperemia, some fish eyeballs are protruding, there is pale yellow ascites or red turbid ascites in the abdomen, the intestinal wall is congested, and the intestine is inflated without food and mucus. Gill filament bruising or severe anemia, etc. **：

There is a lot of silt at the bottom of the pond, a large amount of toxic substances are deposited, there is a lack of oxygen in the water, and the water environment deteriorates. The weather is abnormal, there is no rain for a long time, the pool water is too fertilized, and there is no new water to replace, which creates conditions for bacteria and viruses to multiply, so that the fish are infected and sick. Failure to do a good job of disinfection of fish bodies and bring in pathogens.

Flow: According to the investigation, the disease is susceptible to infection, and other crucian carp are also infected. The disease is violent, with high morbidity and mortality, and sometimes a pond of crucian carp can die as a result.

The onset season is mostly from May to August. Precautionary measures: Fingerlings should be bathed in 3%-4% salt water for 10 minutes, or 20 milligrams of potassium permanganate solution for 15-20 minutes.

Regular water filling, regular disinfection, and regular splashing of water quality improver. Equipped with aerators in high-yield ponds. Method:

The whole pool is sprinkled with strong chlorine, the concentration of milligrams of liters, that is, 200 grams per mu per meter of water depth, for 2 consecutive days, and on the third day, 3 tablets of compound chloroxazole were added to each kilogram of concentrate feed to make bait and fed for 3 consecutive days. The whole pool is sprinkled with povidone-iodine at a concentration of 1-2 milliliters. At the same time of pond water disinfection, each kilogram of fish is fed with 2 grams of scutellaria, 5 grams of rhubarb, and 3 grams of cork, once a day, for 4-6 days.

2-3 tablets of viralin per kilogram of feed, crushed and dissolved in water, mixed with feed and fed, for 3 days. The crucian carp breeding pond with a water depth of 1 meter uses 2 kg of tobacco leaves per mu, 7 of 2 ml of enemy killing, 333 grams of copper sulfate, and 5 of 2 ml of banlan root. Usage:

Put the tobacco leaves into an iron pot and boil them for 2 hours, then splash them all over the pool. Then pour the enemy into a wooden basin, dilute it with water, and splash it all over the pool. In the morning of the next day, pour the root of the indigo into the wooden basin, dilute it with water and sprinkle it on the whole pool, and then dilute the copper sulfate on the whole pool, and the sick fish can be cured after 3-4 days.

It is a viral disease. Aquatic reovirus, belonging to the family Reoviridae, aquatic animal reovirus.

1.Incubation period: 3-1 days, during which the appearance of the fish does not show any symptoms, activity and feeding are normal.

The length of the incubation period is closely related to the water temperature and virus concentration, the higher the water temperature, the higher the virus concentration, and the short incubation period. Conversely, the incubation period is longer. 2.Pre-trend:

The time is short, only 1 2 days, the body color of the fish is dark and black, and it swims alone and stops feeding.

3.Development stage: The length of time varies, generally 1 2 days, and the diseased fish show symptoms of congestion and bleeding.

The pathogen cannot be removed, and after about a week of this disease, the death of the fish will decline after reaching its peak, and how much it can survive depends on luck. The main thing is to see the clear pond and pay attention to it when cultivating water.