The common diseases of rainbow trout include nutritive diseases, ectoparasitic diseases, hydromycosis, bacterial canal rot disease, gill disease, and enteritis, among which the most common are nutritional diseases, followed by echinococcosis and third generation worm diseases. .

When the fish is in poor health, the fish will leave the colony and swim to the drainage area or slowly swim in the pool wall or pool bottom. Unhealthy diseased fish have dark or dark body color, slow feeding, reduced food intake, abnormal swimming patterns, or abdominal distension, sacral lids, edema on the surface of the fish, white spots, and white-cloudy mucus. The fins are eroded and the base is congested. Anal dilatation, congestion, or faecal adhesions. Through the dissection, it can be seen that the internal organs of the fish also show abnormal symptoms. Kidney, liver discoloration, shape variation, gastrointestinal full of mucus.

The prevention and control of rainbow trout disease should adopt comprehensive prevention and control measures to prevent and control disease. The main measures are:

1. Select excellent fish species with strong physique and strong disease resistance.

2, improve the pool of dissolved oxygen, keep the water clean and hygienic.

3, feeding fresh, palatable full-size pellet feed.

4, adhere to the disinfection of fish into the pool, the onset of the season but also to disinfect the water, eliminate the source of disease, timely feeding medicine bait for prevention.

5. Observe carefully and find out that the condition is diagnosed and treated in time and keep the sick fish alone. Nutritional diseases should be started with improved feed and fed with palatable and nutritious feed.

6. Adding a certain amount of traditional Chinese medicine such as yellow powder in feed can effectively prevent parasites and bacterial diseases.

7, in the summer, to increase oxygen, increase the amount of dissolved oxygen in the water to prevent fish floating head.

As long as we have mastered the law of life of rainbow trout and can strictly manage it in accordance with scientific breeding methods, rainbow trout farming industry will bring good economic benefits.

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