5 mm round hole.

It is better to choose a fishing umbrella cage with 5 mm round holes. The more holes in the cage for catching fish, the worse it is for the fry, so there should not be too many.

There are two ways to put the cage. Fix the big end and put the other end on the boat and slowly move it outward. Be careful not to put the cage too tight. If it is too tight, not even one fish or shrimp will be left. Can't catch. Another small one has a strong rope tied to its head, and is thrown directly into the water while standing at the water's edge, and then tied to a fixed object on the shore. This is also called cage throwing.