Mountain grouper fish is also known as flower star fish, seven-star fish, scale star fish, middle male fish, and its scientific name is moon snakehead. Mountain grouper has strong adaptability and is easy to breed. It can be cultured in ponds or fish ponds. According to the experimental summary: The following aspects must be paid attention to in mountain grouper farming. 1. Fish can be released into the pond only after the effect of pond clearing drugs has completely disappeared.

2. When releasing fish, the temperature difference between the water temperature in the container containing the fry and the water temperature in the fish pond should not exceed 3 degrees Celsius. If the temperature difference is too large, the water temperature should be adjusted before releasing the fry into the pond.

3. Fish pond fry should be placed in the upwind part of the pond. After stirring the water surface with your hands, tilt the container containing the fry into the water and slowly pour the fry into the water. (1) Symptoms: In the early stage of the disease, the sick fish stop eating, turn black, and cluster in the corners of the pond. In severe cases, people may swim around in the water, struggle violently or spin around wildly before sinking to the bottom of the pool and dying. The cause of this disease is not yet clear.

(2) Harm and epidemic situation: The disease is more common in fry of the year before the body length is 4 centimeters. The epidemic season is from March to July, and the epidemic is from April to May. This disease has a rapid onset and spread, with an incidence and mortality rate of over 90%. It is the most harmful explosive fish disease in the seedling stage of moon snakehead.

(3) Prevention and treatment methods: There is currently no treatment method. The following preventive measures are mainly adopted:

A. Fish farming facilities and tools must be strictly disinfected. Live food for feeding should also be disinfected before feeding. Do not transport fish eggs and fry from diseased farms."

B. When changing the water, do not fill the water too quickly; the water temperature difference should not be greater than ±2°C. Sprinkle carbon dioxide in time after each water change Chlorine, make the pool water 5PPM. Or sprinkle the whole pool with 0.4PPM furazolidone, or splash it with quicklime water to make the pool water pH 7-8. (1) Symptoms: plaque-like congestion on the body surface, peeling of scales, and subsequent dermis. The tissue becomes ulcerated, and the ulcerated area begins to turn red, and then becomes necrotic and turns white. In severe cases, it can rot to the muscles or bones, and can occur anywhere on the body surface. In severe cases, it can spread throughout the body.

(2) Harm and epidemic situation: This disease is more common in fish species and adult fish with a body length of more than 4 cm, and can occur throughout the year. It is highly contagious after onset, and cross-infection is also relatively serious. If not treated in time, the mortality rate is over 50%, so it is known as the "red plague". This disease can easily be caused by adverse conditions such as fish damage, excessive breeding density, deterioration of water quality, or large changes in water temperature.

(3) Prevention and control methods:

A. Purify the water with 5-10PPM chlorine dioxide or 0.3PPM and then splash it in the whole pool. If the condition is serious, splash it again after two days. When the water quality deteriorates, It can add 10PPM of water purifier.

B. Sprinkle furazolidone in the whole pond to make the pond water reach a concentration of 0.5 to 1PPM. (1) Symptoms: After the sick fish is heavily parasitized by trichozoa, the color of the body changes. They are black and emaciated, with increased mucus and a white film on their body. They swim alone in the pool and eventually die due to exhaustion. This pathogen is not visible to the naked eye, but can be detected under a microscope. Very obvious.

(2) Prevention and control methods:

A. Spray the entire pool with 0.7PPM copper sulfate.

B. Use 0.5PPM copper sulfate and 0.2. Sprinkle PPM ferrous sulfate mixture throughout the pond.

C. Sprinkle the decoction of neem leaves to make the pond water reach a concentration of 30-45 PPA. (1) Symptoms: The body of the sick fish becomes black, the abdomen is swollen, and the body surface is swollen. The anus may be red and swollen without wounds. The anatomy shows congestion, enlargement and ulceration of the kidneys, and fish species in the affected pond like to gather in the corners of the pond.

Epidemic situation: The epidemic season of this disease is generally from May to September, and the disease water temperature is 15-40℃, and the optimal water temperature is 25-30℃. The mortality rate of diseased fish is 30-60% in the long-term investment stage. Fish ponds fed with earthworms are prone to this disease.

(3) Prevention and treatment methods:

A. Use 0.3PPM Baidujing or 2-5PPM Styromycin or 10-20PPM chlorine. Sprinkle chloramphenicol or 0.2-0.5PPM furazolidone in the whole tank. If the condition is serious, it can be sprinkled for 2 days.

B. Add 30-50 grams of chloramphenicol per kilogram of fish to the bait every day, and feed 5. days.

C. Add 2-3 grams of norfloxacin and 20 grams of photosynthetic bacteria per kilogram of bait, and feed for 5-7 days.