You can clearly see that there seem to be many white spots on the fish's body. The photo is not good. There must be white spot disease or melon parasite.

I hope it's just white spots that cause malnutrition and gastrointestinal discomfort, because this is a common disease that can be seen and is easy to treat. It costs 5 yuan to clean the medicated bath with white spots, and change the water in the whole cylinder the next day, with as little mercury as possible, and high concentration is easy to be poisoned.

Black spots grow on my body because of intestinal absorption problems, and color hormones can't reach the scales on my body surface, so I don't want to eat them.

As for what causes enteritis, it may be a variety of factors, and we will know which one is by excluding it.

1 water quality, such as poor tap water quality,

2 food, such as eating too much or expired food at one time,

Parasites, such as intestinal parasites or excessive parasites in vitro,

4 germs, such as mold,

Poisoning, such as taking drugs.