There are several ways to catch crabs.
Crabs live in nests near the water, and there are many footprints in the flat hole. The size of the hole can often be used to roughly judge the size of crabs in the hole. There is no other way but to dig a hole. With a shovel, you can "please" the crab hidden deep in the hole, no matter it is covered in mud. Grab the sides of the crab shell and throw it into the water a few times to make it a bright crab.
Method of blocking the crab cave: Crabs are aerobic breathing animals, and they will come out to breathe every once in a while, so after finding the crab cave, just block the hole with grass balls or other things. When the air in the cave is exhausted, the crab will automatically climb to the mouth of the cave. After an hour, all you have to do is go to the cave and take the grass away, and you can catch crabs directly.
light capture method: this method is very simple and very effective. Because crabs like bright light at night, as long as the light is placed above the shore, crabs will climb over it, so it is very easy to catch one.
crab fishing with crab net: The crab fishing net is similar to the shrimp fishing net, but the difference is that the latter uses gauze, while the former is a perforated net woven with cotton yarn. Followed by bait, it is best to use skinned snake meat to catch crabs. The white snake meat is 2 cm long and tied in the middle of the net. It is easy to be found when it sinks to the bottom of the water. Snakes are hard to catch, so they have to be replaced by skinned frog meat, which is also white. Crabs are not as fierce as shrimps, and it takes 15-2 minutes to lift the nets, one by one in order. When the crab enters the net, it just enjoys the delicious food. By the time you lift the net, it is too late to escape. Eight crab claws are stuck in the net eyes and can't move, so they just quit.
Fishing for crabs: This method is mainly suitable for wider water. Use a fishing net to intercept the water surface, and then several people pull forward, after a certain distance, close the net and go ashore, and catch the crabs that enter the net.