02. Tornadoes may appear in the area brought by tornadoes, but when tornadoes come, many things in the pond will be caught by the eye of the wind. As the wind of the tornado weakens, some fish or fish eggs in pneumonia will be thrown out again. In this case, these fish and fish eggs are likely to be thrown into the pond without fish.
It was brought by some animals. In nature, many birds have the habit of eating fish, and these birds are likely to get some fish eggs when fishing. Or some fish are not fully digested by birds. After that, the birds will fly to the pond without fish, or defecate on the pond. In this case, the fish eggs will fall back to the new pond for a long time, and the fish eggs will be hatched. Of course, besides birds, many animals may bring fish eggs into the new pond.
04. It is caused by the interoperability of nature. Although there is no direct connection between ponds, there are actually some springs at the bottom of ponds, and these springs or groundwater are actually connected. Sometimes fish eggs or fish in a pond will flow directly into a new pond through groundwater. Because these waters can communicate with each other, some fish will appear in the new pond after a long time.
Generally speaking, if fish suddenly appear in a pond without fish, it is actually caused by the above situations. Among the above situations, the third situation should be the most common, or the most common.