Red worms can survive in sewage, but if they are put in clean water, they must ensure enough dissolved oxygen. It is best to choose a wide-mouth container with a water depth of no more than 3 cm. If you put it in the freezer, you can live for a week, and the activities in the first three days are ok, but a lot of bugs will die after a long time. When you put it in the refrigerator, you must pay attention to the tightness of the container to avoid contact with food. Generally, the storage temperature can be controlled at about 5 degrees. Generally, red worms are cultivated and harvested in sludge, and there are many harmful bacteria. When feeding the fish, it is best to wash it with diluted potassium permanganate solution first, and then rinse it with clear water, which is better for feeding the fish. Fishing doesn't matter. Might as well buy live fish.