Zebrafish jump, but under normal breeding conditions, they don't jump. If they jump, it may be caused by lack of oxygen, and their demand for oxygen is relatively high. If there is insufficient oxygen in the water in which they live, there will be cylinder jumping. It is also possible that the breeding density is too high and the activity space is insufficient, which will also lead to zebrafish jumping. It is also possible that they are frightened, their emotions are unstable, and they are prone to jumping.

1. Keep sufficient oxygen: Zebrafish need sufficient oxygen to grow better, and breeders need to install an oxygen pump for them, so as to ensure their sufficient oxygen and avoid jumping cylinders.

2. Increase the activity space: Breeders should also ensure that they have sufficient living space. It is best to prepare a larger fish tank for them, and also reduce the breeding density. As long as there is enough space for zebrafish to move, there will generally be no cylinder jumping.

3. Keep the environment stable: Zebrafish is small in size and less courageous. If breeders want to avoid them jumping, they must ensure that their living environment is quiet.

4. Keep the environment stable: They are also sensitive to environmental fluctuations. Breeders need to use heating rods to keep the water temperature in a stable range. Filters should also be installed to slow down the deterioration of water quality.