What happened to goldfish jumping out of the fish tank these two days?

There are many reasons why fish jump out of the tank. The first possibility is that the dissolved oxygen in the water is too low, causing the goldfish to jump into the tank. The second possibility is that the fish tank is too small and the fish is too big, resulting in a small range of fish activities and jumping over the tank. The third possibility, being frightened, can also lead to a cylinder jump. The fourth possibility is parasitic disease, which will cause fish to be restless, scurry around and then jump out of the tank. The fifth is too excited. When you see the host coming and want to eat, you will also jump over the jar, but as you said, this possibility is very small. The above are some reasons for the cylinder jump. I hope it helps you. Then you should observe more, find out what the reason is and take measures in time. Well, these are your answers and suggestions. I wish you success in raising fish.