In fact, the invention of the fishing box was originally used to hold fish. It originated from rock fishing in Japan, because sea fish quickly die and are prone to spoilage when they come out of the water. Putting them in the fishing box can keep them cold and have water, making it convenient to keep the fish fresh. Although fishing boxes have been developed for more purposes, such as serving as chairs and storing fishing gear, the basic purpose of holding fish has not been abandoned.If you want to fish, you need to fill it with water. The water you put in cannot be tap water, because tap water contains chlorine gas, which can easily cause the fish caught to die. It is recommended to use water from the water area, but also be careful to avoid using water from areas with poor water quality.2. Add oxygen to the fishing boxLow dissolved oxygen levels in water can also lead to fish death. You can add solid oxygen to the fishing box or use an oxygenation pump to increase the dissolved oxygen level in the water and prevent fish from dying due to lack of oxygen.3. Pay attention to ensuring the temperature of the fishing boxThe fishing box has the ability to keep cool and warm, but it can only exert its cooling ability when it is closed. Therefore, after the fish caught are put into the fishing box, the lid of the fishing box should be closed in a timely manner. If there are fish inside, do not open the fishing box for a long time. When the temperature is relatively high, it is necessary to put some small ice cubes inside.4. Pay attention to the number of fish in the fishing boxThe number of fish that can be placed in the fishing box mainly depends on the space capacity of the fishing box. If too many fish are placed in the fishing box due to limited capacity, it is easy to cause the fish to not have enough space and die. If there are many fish, it is recommended to