1. Reason: Black spots on goldfish may be caused by fear. Goldfish are less daring, and there is too much noise around them, so they are easily frightened.

2, Solution: Breeders need to keep their living environment quiet, which can speed up recovery. After the goldfish recovers from the frightened mood, the body color will naturally recover.

1. Reason: Black spots on goldfish may also be caused by great changes in the environment, although they have strong adaptability. But the environment has changed so much that they will also be stimulated.

2, Solution: Breeders need to keep their surroundings stable to prevent them from being stimulated again. After they adapt to the new environment, feed them with some color-enhancing feed, so that their body color can be restored. At ordinary times, you can also feed some rich shrimp, red worms and other foods to make their body color more bright.

1. Reason: Black spots on goldfish may also be due to black spot disease, mainly bacterial infection or trauma. After suffering from black spot, black spots will appear on the body.

2. Solution: Breeders need to isolate diseased fish first, which can reduce their chances of infection. Then use malachite green solution or methyl blue to give sick fish a medicated bath, and stick to the medicated bath for 1 week, and the black spot disease can be alleviated.